./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/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_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/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_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- 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 10:21:45,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:21:45,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:21:45,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:21:45,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:21:45,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:21:45,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:21:45,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:21:45,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:21:45,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:21:45,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:21:45,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:21:45,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:21:45,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:21:45,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:21:45,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:21:45,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:21:45,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:21:45,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:21:45,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:21:45,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:21:45,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:21:45,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:21:45,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:21:45,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:21:45,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:21:45,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:21:45,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:21:45,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:21:45,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:21:45,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:21:45,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:21:45,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:21:45,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:21:45,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:21:45,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:21:45,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:21:45,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:21:45,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:21:45,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:21:45,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:21:45,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:21:45,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:21:45,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:21:45,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:21:45,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:21:45,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:21:45,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:21:45,468 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:21:45,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:21:45,468 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:21:45,468 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:21:45,468 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:21:45,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:21:45,469 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:21:45,469 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:21:45,469 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:21:45,469 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:21:45,469 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:21:45,469 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:21:45,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:21:45,470 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:21:45,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:21:45,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:21:45,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:21:45,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:21:45,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:21:45,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:21:45,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:21:45,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:21:45,471 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:21:45,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:21:45,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:21:45,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:21:45,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:21:45,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:21:45,471 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:21:45,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:21:45,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:21:45,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:21:45,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:21:45,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:21:45,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:21:45,472 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_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2022-12-14 10:21:45,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:21:45,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:21:45,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:21:45,680 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:21:45,680 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:21:45,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-12-14 10:21:48,332 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:21:48,496 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:21:48,496 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-12-14 10:21:48,500 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/data/62d75fe98/db9957fcf1f64f5d8e6aa596364fb282/FLAG3fbb52ac8 [2022-12-14 10:21:48,511 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/data/62d75fe98/db9957fcf1f64f5d8e6aa596364fb282 [2022-12-14 10:21:48,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:21:48,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:21:48,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:21:48,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:21:48,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:21:48,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f31cd77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48, skipping insertion in model container [2022-12-14 10:21:48,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:21:48,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:21:48,657 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_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-12-14 10:21:48,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:21:48,678 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:21:48,688 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_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-12-14 10:21:48,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:21:48,705 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:21:48,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48 WrapperNode [2022-12-14 10:21:48,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:21:48,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:21:48,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:21:48,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:21:48,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,733 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-12-14 10:21:48,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:21:48,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:21:48,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:21:48,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:21:48,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:21:48,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:21:48,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:21:48,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:21:48,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (1/1) ... [2022-12-14 10:21:48,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:21:48,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:48,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:21:48,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:21:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:21:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:21:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:21:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:21:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:21:48,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:21:48,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:21:48,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:21:48,878 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:21:48,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:21:48,993 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:21:49,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:21:49,024 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 10:21:49,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:21:49 BoogieIcfgContainer [2022-12-14 10:21:49,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:21:49,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:21:49,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:21:49,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:21:49,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:21:48" (1/3) ... [2022-12-14 10:21:49,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2019602d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:21:49, skipping insertion in model container [2022-12-14 10:21:49,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:21:48" (2/3) ... [2022-12-14 10:21:49,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2019602d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:21:49, skipping insertion in model container [2022-12-14 10:21:49,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:21:49" (3/3) ... [2022-12-14 10:21:49,033 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2022-12-14 10:21:49,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:21:49,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:21:49,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:21:49,093 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;@135f154b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:21:49,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:21:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:21:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:21:49,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:49,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:49,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash 299006297, now seen corresponding path program 1 times [2022-12-14 10:21:49,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:49,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976439810] [2022-12-14 10:21:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:49,262 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 10:21:49,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:49,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976439810] [2022-12-14 10:21:49,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976439810] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:21:49,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:21:49,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:21:49,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683167639] [2022-12-14 10:21:49,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:21:49,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:21:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:49,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:21:49,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:21:49,296 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 10:21:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:49,332 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2022-12-14 10:21:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:21:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 10:21:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:49,340 INFO L225 Difference]: With dead ends: 25 [2022-12-14 10:21:49,340 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 10:21:49,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:21:49,344 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:49,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:21:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 10:21:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 10:21:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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 10:21:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-12-14 10:21:49,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2022-12-14 10:21:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:49,376 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-12-14 10:21:49,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 10:21:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-12-14 10:21:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:21:49,377 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:49,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:49,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:21:49,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash 257654775, now seen corresponding path program 1 times [2022-12-14 10:21:49,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:49,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009670893] [2022-12-14 10:21:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:49,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:21:49,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009670893] [2022-12-14 10:21:49,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009670893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:49,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765315676] [2022-12-14 10:21:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:49,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:49,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:49,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:49,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:21:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:21:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:49,532 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 10:21:49,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:21:49,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765315676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:21:49,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:21:49,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 5 [2022-12-14 10:21:49,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096707731] [2022-12-14 10:21:49,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:21:49,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:21:49,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:21:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:21:49,535 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 10:21:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:49,570 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-12-14 10:21:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:21:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-12-14 10:21:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:49,571 INFO L225 Difference]: With dead ends: 21 [2022-12-14 10:21:49,572 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 10:21:49,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:21:49,573 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:49,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:21:49,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 10:21:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-12-14 10:21:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 10:21:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-12-14 10:21:49,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2022-12-14 10:21:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:49,577 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-12-14 10:21:49,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 10:21:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-12-14 10:21:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:21:49,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:49,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:49,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:49,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:49,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1455817017, now seen corresponding path program 1 times [2022-12-14 10:21:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:49,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23906232] [2022-12-14 10:21:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:21:49,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:49,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23906232] [2022-12-14 10:21:49,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23906232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:49,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928955381] [2022-12-14 10:21:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:49,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:49,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:49,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:21:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:50,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:21:50,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:21:50,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:21:50,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928955381] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:50,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688599500] [2022-12-14 10:21:50,057 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:21:50,057 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:50,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:50,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:50,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:50,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:50,132 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:21:50,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:21:50,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:50,161 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:21:50,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:21:50,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:50,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:21:50,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:50,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:21:50,309 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:21:50,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-12-14 10:21:50,421 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 10:21:50,441 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:50,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1688599500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:21:50,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:50,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2022-12-14 10:21:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771009117] [2022-12-14 10:21:50,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:21:50,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:21:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:21:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:21:50,515 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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 10:21:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:50,556 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2022-12-14 10:21:50,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:21:50,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 10:21:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:50,557 INFO L225 Difference]: With dead ends: 24 [2022-12-14 10:21:50,557 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 10:21:50,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:21:50,559 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:50,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:21:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 10:21:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-12-14 10:21:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 10:21:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-12-14 10:21:50,564 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 11 [2022-12-14 10:21:50,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:50,565 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-12-14 10:21:50,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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 10:21:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-12-14 10:21:50,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:21:50,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:50,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:50,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:50,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:50,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash 170604718, now seen corresponding path program 1 times [2022-12-14 10:21:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:50,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600839633] [2022-12-14 10:21:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:50,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:21:50,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600839633] [2022-12-14 10:21:50,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600839633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5563003] [2022-12-14 10:21:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:50,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:50,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:50,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:21:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:21:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:21:50,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:21:50,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5563003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183098739] [2022-12-14 10:21:50,990 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:21:50,990 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:50,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:50,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:50,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:51,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:51,017 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:21:51,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:21:51,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:51,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:21:51,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:51,045 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 10:21:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:51,094 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:21:51,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-12-14 10:21:51,139 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 10:21:51,239 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:51,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '358#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:51,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:51,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:51,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 10:21:51,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872348217] [2022-12-14 10:21:51,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:51,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:21:51,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:21:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:21:51,463 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 10:21:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:51,497 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2022-12-14 10:21:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:21:51,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 12 [2022-12-14 10:21:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:51,498 INFO L225 Difference]: With dead ends: 46 [2022-12-14 10:21:51,498 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 10:21:51,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:21:51,499 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:51,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 24 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:21:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 10:21:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 17. [2022-12-14 10:21:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 10:21:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 10:21:51,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-12-14 10:21:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:51,505 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 10:21:51,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 10:21:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 10:21:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:21:51,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:51,506 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:51,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:21:51,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:51,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash -780057460, now seen corresponding path program 2 times [2022-12-14 10:21:51,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:51,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916253758] [2022-12-14 10:21:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:21:51,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:51,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916253758] [2022-12-14 10:21:51,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916253758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:51,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966134890] [2022-12-14 10:21:51,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:21:51,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:51,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:51,824 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:51,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:21:51,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:21:51,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:21:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:21:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:21:51,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966134890] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:51,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857102825] [2022-12-14 10:21:51,902 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:21:51,902 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:51,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:51,903 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:51,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:51,926 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:21:51,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:21:51,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:51,946 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:21:51,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:21:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:51,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:21:52,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:52,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:21:52,019 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:21:52,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-12-14 10:21:52,081 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 10:21:52,194 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:52,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:52,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:52,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:52,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-14 10:21:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984460536] [2022-12-14 10:21:52,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:52,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:21:52,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:21:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:21:52,421 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 10:21:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:52,477 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-12-14 10:21:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:21:52,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) Word has length 15 [2022-12-14 10:21:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:52,478 INFO L225 Difference]: With dead ends: 32 [2022-12-14 10:21:52,478 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 10:21:52,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:21:52,479 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:52,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:21:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 10:21:52,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 10:21:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 10:21:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-12-14 10:21:52,486 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 15 [2022-12-14 10:21:52,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:52,486 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-12-14 10:21:52,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 10:21:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-12-14 10:21:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:21:52,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:52,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:52,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:21:52,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:52,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:52,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1659248324, now seen corresponding path program 3 times [2022-12-14 10:21:52,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:52,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718450084] [2022-12-14 10:21:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:52,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 10:21:52,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718450084] [2022-12-14 10:21:52,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718450084] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852912448] [2022-12-14 10:21:52,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:52,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:52,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:52,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:52,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:21:52,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:52,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:52,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:21:52,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:21:52,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 10:21:52,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852912448] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:52,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059257474] [2022-12-14 10:21:52,992 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:21:52,992 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:52,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:52,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:52,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:53,010 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:21:53,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:21:53,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:53,026 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:21:53,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:21:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:53,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:21:53,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:53,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:21:53,110 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:21:53,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-12-14 10:21:53,167 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 10:21:53,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:53,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '794#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:53,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:53,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:53,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 14 [2022-12-14 10:21:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936145582] [2022-12-14 10:21:53,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:53,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:21:53,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:53,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:21:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:21:53,469 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 10:21:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:53,584 INFO L93 Difference]: Finished difference Result 65 states and 97 transitions. [2022-12-14 10:21:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 10:21:53,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 10:21:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:53,585 INFO L225 Difference]: With dead ends: 65 [2022-12-14 10:21:53,585 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 10:21:53,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:21:53,585 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:53,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:21:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 10:21:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-14 10:21:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 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 10:21:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-12-14 10:21:53,591 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 21 [2022-12-14 10:21:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:53,592 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-12-14 10:21:53,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 10:21:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-12-14 10:21:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 10:21:53,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:53,592 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:53,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:21:53,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 10:21:53,794 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:53,795 INFO L85 PathProgramCache]: Analyzing trace with hash -951750402, now seen corresponding path program 4 times [2022-12-14 10:21:53,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:53,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138159263] [2022-12-14 10:21:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:53,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 10:21:53,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:53,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138159263] [2022-12-14 10:21:53,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138159263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:53,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252838158] [2022-12-14 10:21:53,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:21:53,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:53,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:53,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:53,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:21:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:21:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 10:21:54,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 10:21:54,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252838158] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201923231] [2022-12-14 10:21:54,219 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:21:54,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:54,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:54,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:54,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:54,237 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:21:54,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:21:54,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:54,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:21:54,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:54,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:21:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:54,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:21:54,296 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:21:54,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-12-14 10:21:54,354 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 10:21:54,431 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:54,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:54,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:54,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:54,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-12-14 10:21:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867129840] [2022-12-14 10:21:54,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:54,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:21:54,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:21:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:21:54,615 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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 10:21:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:54,799 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2022-12-14 10:21:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 10:21:54,799 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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 40 [2022-12-14 10:21:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:54,800 INFO L225 Difference]: With dead ends: 201 [2022-12-14 10:21:54,800 INFO L226 Difference]: Without dead ends: 172 [2022-12-14 10:21:54,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:21:54,802 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 459 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:54,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 96 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:21:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-12-14 10:21:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 55. [2022-12-14 10:21:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:21:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-12-14 10:21:54,817 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 40 [2022-12-14 10:21:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:54,817 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-12-14 10:21:54,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 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 10:21:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-12-14 10:21:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:21:54,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:54,819 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:54,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:21:55,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:21:55,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash -254318308, now seen corresponding path program 5 times [2022-12-14 10:21:55,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:55,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25761448] [2022-12-14 10:21:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:55,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 10:21:55,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:55,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25761448] [2022-12-14 10:21:55,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25761448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:55,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855158162] [2022-12-14 10:21:55,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:21:55,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:55,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:55,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:55,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:21:55,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:21:55,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:21:55,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-12-14 10:21:55,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:21:55,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855158162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:21:55,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:21:55,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26] total 30 [2022-12-14 10:21:55,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894425902] [2022-12-14 10:21:55,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:21:55,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:21:55,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:21:55,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:21:55,651 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 10:21:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:55,707 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-12-14 10:21:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:21:55,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 53 [2022-12-14 10:21:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:55,708 INFO L225 Difference]: With dead ends: 96 [2022-12-14 10:21:55,708 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 10:21:55,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:21:55,709 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:55,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:21:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 10:21:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2022-12-14 10:21:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 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 10:21:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-12-14 10:21:55,719 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 53 [2022-12-14 10:21:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:55,719 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-12-14 10:21:55,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 10:21:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-12-14 10:21:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 10:21:55,720 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:55,720 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:55,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:55,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:55,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:55,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:55,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1237640967, now seen corresponding path program 6 times [2022-12-14 10:21:55,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:55,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270886413] [2022-12-14 10:21:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:55,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 10:21:56,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:56,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270886413] [2022-12-14 10:21:56,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270886413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:56,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156064293] [2022-12-14 10:21:56,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:21:56,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:56,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:56,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:56,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:21:56,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:21:56,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:56,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:21:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-12-14 10:21:56,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-12-14 10:21:56,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156064293] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:56,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929389235] [2022-12-14 10:21:56,710 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:21:56,710 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:21:56,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:21:56,710 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:21:56,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:21:56,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:56,725 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:21:56,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:21:56,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:56,741 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:21:56,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:21:56,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:56,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:21:56,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:21:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:21:56,804 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:21:56,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-12-14 10:21:56,854 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 10:21:56,932 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:21:57,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2534#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:21:57,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:21:57,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:21:57,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2022-12-14 10:21:57,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974988280] [2022-12-14 10:21:57,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:21:57,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 10:21:57,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:21:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 10:21:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=1330, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 10:21:57,244 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 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 10:21:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:57,869 INFO L93 Difference]: Finished difference Result 224 states and 338 transitions. [2022-12-14 10:21:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 10:21:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 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 54 [2022-12-14 10:21:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:57,871 INFO L225 Difference]: With dead ends: 224 [2022-12-14 10:21:57,872 INFO L226 Difference]: Without dead ends: 169 [2022-12-14 10:21:57,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1440, Invalid=3530, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 10:21:57,875 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 197 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:57,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 35 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:21:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-14 10:21:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 118. [2022-12-14 10:21:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3418803418803418) internal successors, (157), 117 states have internal predecessors, (157), 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 10:21:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2022-12-14 10:21:57,900 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 54 [2022-12-14 10:21:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:57,900 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2022-12-14 10:21:57,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 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 10:21:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2022-12-14 10:21:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:21:57,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:57,901 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:57,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:21:58,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:58,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:21:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1350868375, now seen corresponding path program 7 times [2022-12-14 10:21:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:21:58,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354755140] [2022-12-14 10:21:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:21:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:21:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-12-14 10:21:59,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:21:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354755140] [2022-12-14 10:21:59,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354755140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:21:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092296085] [2022-12-14 10:21:59,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:21:59,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:21:59,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:21:59,080 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:21:59,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:21:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:21:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 10:21:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-12-14 10:21:59,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-12-14 10:22:00,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092296085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:22:00,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994464141] [2022-12-14 10:22:00,451 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:22:00,451 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:00,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:00,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:00,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:00,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:00,472 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:22:00,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:22:00,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:00,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:22:00,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:00,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:22:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:00,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:22:00,533 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:22:00,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-12-14 10:22:00,589 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 10:22:00,659 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:01,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4000#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:01,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:01,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:22:01,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2022-12-14 10:22:01,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507640662] [2022-12-14 10:22:01,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:01,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 10:22:01,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 10:22:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=4011, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 10:22:01,006 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 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 10:22:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:01,899 INFO L93 Difference]: Finished difference Result 655 states and 922 transitions. [2022-12-14 10:22:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-14 10:22:01,899 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 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 116 [2022-12-14 10:22:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:01,903 INFO L225 Difference]: With dead ends: 655 [2022-12-14 10:22:01,903 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 10:22:01,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2961, Invalid=4011, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 10:22:01,905 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1518 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:01,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 252 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:22:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 10:22:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 156. [2022-12-14 10:22:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.2580645161290323) internal successors, (195), 155 states have internal predecessors, (195), 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 10:22:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 195 transitions. [2022-12-14 10:22:01,934 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 195 transitions. Word has length 116 [2022-12-14 10:22:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:01,934 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 195 transitions. [2022-12-14 10:22:01,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 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 10:22:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 195 transitions. [2022-12-14 10:22:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 10:22:01,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:01,936 INFO L195 NwaCegarLoop]: trace histogram [74, 35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:22:01,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:22:02,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:02,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:02,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1418193321, now seen corresponding path program 8 times [2022-12-14 10:22:02,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:02,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008516753] [2022-12-14 10:22:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-12-14 10:22:04,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:04,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008516753] [2022-12-14 10:22:04,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008516753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:04,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544456991] [2022-12-14 10:22:04,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:22:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:04,466 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:04,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:22:04,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:22:04,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:22:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2022-12-14 10:22:04,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2022-12-14 10:22:04,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544456991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:22:04,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668510810] [2022-12-14 10:22:04,789 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:22:04,789 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:04,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:04,789 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:04,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:04,804 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:22:04,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:22:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:04,819 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:22:04,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:22:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:04,830 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 10:22:04,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:04,862 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:22:04,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-12-14 10:22:04,897 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 10:22:04,964 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:05,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6424#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:05,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:05,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:22:05,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 6, 6] total 84 [2022-12-14 10:22:05,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000497384] [2022-12-14 10:22:05,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:05,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-14 10:22:05,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-14 10:22:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3212, Invalid=4978, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 10:22:05,346 INFO L87 Difference]: Start difference. First operand 156 states and 195 transitions. Second operand has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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 10:22:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:23,529 INFO L93 Difference]: Finished difference Result 4022 states and 6120 transitions. [2022-12-14 10:22:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-12-14 10:22:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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 154 [2022-12-14 10:22:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:23,542 INFO L225 Difference]: With dead ends: 4022 [2022-12-14 10:22:23,542 INFO L226 Difference]: Without dead ends: 3867 [2022-12-14 10:22:23,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74532 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=45627, Invalid=168279, Unknown=0, NotChecked=0, Total=213906 [2022-12-14 10:22:23,557 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1931 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1746 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:23,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1931 Valid, 76 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1746 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:22:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2022-12-14 10:22:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 387. [2022-12-14 10:22:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5932642487046633) internal successors, (615), 386 states have internal predecessors, (615), 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 10:22:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 615 transitions. [2022-12-14 10:22:23,840 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 615 transitions. Word has length 154 [2022-12-14 10:22:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:23,840 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 615 transitions. [2022-12-14 10:22:23,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 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 10:22:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 615 transitions. [2022-12-14 10:22:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-12-14 10:22:23,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:23,845 INFO L195 NwaCegarLoop]: trace histogram [151, 76, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:22:23,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:22:24,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:22:24,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 651072780, now seen corresponding path program 9 times [2022-12-14 10:22:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:24,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553285833] [2022-12-14 10:22:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:24,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:22:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 28275 trivial. 0 not checked. [2022-12-14 10:22:28,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553285833] [2022-12-14 10:22:28,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553285833] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003633801] [2022-12-14 10:22:28,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:22:28,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:28,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:28,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:22:28,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:22:28,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:28,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 2023 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 10:22:28,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 28045 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2022-12-14 10:22:28,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 28045 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2022-12-14 10:22:33,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003633801] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:22:33,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350905565] [2022-12-14 10:22:33,196 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:22:33,196 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:33,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:33,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:33,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:33,214 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:22:33,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:22:33,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:33,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 10:22:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:33,232 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 10:22:33,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:33,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:22:33,269 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:22:33,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-12-14 10:22:33,296 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 10:22:33,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:33,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18362#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:33,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:33,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:22:33,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 79, 79] total 156 [2022-12-14 10:22:33,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236693809] [2022-12-14 10:22:33,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-12-14 10:22:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:33,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-12-14 10:22:33,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11972, Invalid=14434, Unknown=0, NotChecked=0, Total=26406 [2022-12-14 10:22:33,834 INFO L87 Difference]: Start difference. First operand 387 states and 615 transitions. Second operand has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 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 10:23:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:23:09,569 INFO L93 Difference]: Finished difference Result 34751 states and 60711 transitions. [2022-12-14 10:23:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2022-12-14 10:23:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 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 385 [2022-12-14 10:23:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:23:09,663 INFO L225 Difference]: With dead ends: 34751 [2022-12-14 10:23:09,664 INFO L226 Difference]: Without dead ends: 34365 [2022-12-14 10:23:09,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1308 GetRequests, 1070 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7751 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=18132, Invalid=39228, Unknown=0, NotChecked=0, Total=57360 [2022-12-14 10:23:09,676 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 287 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:23:09,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 59 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:23:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34365 states. [2022-12-14 10:23:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34365 to 618. [2022-12-14 10:23:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.4959481361426257) internal successors, (923), 617 states have internal predecessors, (923), 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 10:23:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 923 transitions. [2022-12-14 10:23:12,381 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 923 transitions. Word has length 385 [2022-12-14 10:23:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:23:12,381 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 923 transitions. [2022-12-14 10:23:12,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 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 10:23:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 923 transitions. [2022-12-14 10:23:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-12-14 10:23:12,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:23:12,391 INFO L195 NwaCegarLoop]: trace histogram [153, 152, 152, 151, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:23:12,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 10:23:12,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:23:12,592 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:23:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:23:12,594 INFO L85 PathProgramCache]: Analyzing trace with hash -12921730, now seen corresponding path program 10 times [2022-12-14 10:23:12,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:23:12,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982028201] [2022-12-14 10:23:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:23:12,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:23:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:23:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-12-14 10:23:27,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:23:27,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982028201] [2022-12-14 10:23:27,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982028201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:23:27,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546382179] [2022-12-14 10:23:27,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:23:27,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:23:27,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:23:27,747 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:23:27,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:23:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:23:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 3255 conjuncts, 155 conjunts are in the unsatisfiable core [2022-12-14 10:23:28,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:23:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-12-14 10:23:28,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:23:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-12-14 10:23:44,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546382179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:23:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183950707] [2022-12-14 10:23:44,820 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:23:44,820 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:23:44,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:23:44,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:23:44,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:23:44,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:44,835 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:23:44,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:23:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:44,851 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:23:44,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:23:44,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:44,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 10:23:44,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:23:44,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:23:44,906 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 10:23:44,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-12-14 10:23:44,945 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 10:23:45,025 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:23:45,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93168#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:23:45,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:23:45,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:23:45,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155, 155] total 310 [2022-12-14 10:23:45,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482607162] [2022-12-14 10:23:45,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:23:45,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 311 states [2022-12-14 10:23:45,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:23:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 311 interpolants. [2022-12-14 10:23:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48240, Invalid=52566, Unknown=0, NotChecked=0, Total=100806 [2022-12-14 10:23:45,594 INFO L87 Difference]: Start difference. First operand 618 states and 923 transitions. Second operand has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 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 10:27:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:27:12,649 INFO L93 Difference]: Finished difference Result 59544 states and 103441 transitions. [2022-12-14 10:27:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 310 states. [2022-12-14 10:27:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 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 616 [2022-12-14 10:27:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:27:12,754 INFO L225 Difference]: With dead ends: 59544 [2022-12-14 10:27:12,754 INFO L226 Difference]: Without dead ends: 59081 [2022-12-14 10:27:12,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2001 GetRequests, 1685 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3846 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=48240, Invalid=52566, Unknown=0, NotChecked=0, Total=100806 [2022-12-14 10:27:12,777 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10941 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 1751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10941 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1751 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:27:12,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10941 Valid, 978 Invalid, 3482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1751 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 10:27:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59081 states. [2022-12-14 10:27:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59081 to 773. [2022-12-14 10:27:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.3963730569948187) internal successors, (1078), 772 states have internal predecessors, (1078), 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 10:27:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1078 transitions. [2022-12-14 10:27:17,004 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1078 transitions. Word has length 616 [2022-12-14 10:27:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:27:17,004 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1078 transitions. [2022-12-14 10:27:17,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 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 10:27:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1078 transitions. [2022-12-14 10:27:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-12-14 10:27:17,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:27:17,009 INFO L195 NwaCegarLoop]: trace histogram [308, 152, 152, 151, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:27:17,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:27:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:27:17,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:27:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:27:17,213 INFO L85 PathProgramCache]: Analyzing trace with hash 140442204, now seen corresponding path program 11 times [2022-12-14 10:27:17,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:27:17,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001940055] [2022-12-14 10:27:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:27:17,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:27:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:28:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 0 proven. 47586 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-12-14 10:28:14,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:28:14,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001940055] [2022-12-14 10:28:14,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001940055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:28:14,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590298279] [2022-12-14 10:28:14,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:28:14,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:28:14,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:28:14,616 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:28:14,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e45ae63f-7f72-44f7-aa19-1996d04bd8a6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:28:14,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:28:14,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:28:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:28:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:28:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 1642 proven. 10 refuted. 0 times theorem prover too weak. 103315 trivial. 0 not checked. [2022-12-14 10:28:15,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:28:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 1642 proven. 10 refuted. 0 times theorem prover too weak. 103315 trivial. 0 not checked. [2022-12-14 10:28:16,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590298279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:28:16,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490867368] [2022-12-14 10:28:16,465 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 10:28:16,465 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:28:16,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:28:16,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:28:16,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:28:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:16,481 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:28:16,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 10:28:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:16,499 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 10:28:16,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:28:16,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:16,511 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 10:28:16,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:16,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:28:16,551 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 10:28:16,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-12-14 10:28:16,577 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 10:28:16,659 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:28:17,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '217961#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:28:17,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:28:17,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:28:17,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [310, 9, 9] total 324 [2022-12-14 10:28:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202434036] [2022-12-14 10:28:17,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:28:17,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 324 states [2022-12-14 10:28:17,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:28:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 324 interpolants. [2022-12-14 10:28:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50174, Invalid=59056, Unknown=0, NotChecked=0, Total=109230 [2022-12-14 10:28:17,891 INFO L87 Difference]: Start difference. First operand 773 states and 1078 transitions. Second operand has 324 states, 324 states have (on average 1.0493827160493827) internal successors, (340), 324 states have internal predecessors, (340), 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)