./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res2o.c --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_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/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_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res2o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/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_7495cf81-661c-4561-a831-365d017a02e8/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 c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- 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 03:19:51,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:19:51,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:19:51,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:19:51,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:19:51,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:19:51,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:19:51,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:19:51,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:19:51,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:19:51,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:19:51,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:19:51,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:19:51,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:19:51,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:19:51,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:19:51,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:19:51,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:19:51,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:19:51,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:19:51,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:19:51,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:19:51,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:19:51,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:19:51,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:19:51,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:19:51,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:19:51,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:19:51,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:19:51,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:19:51,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:19:51,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:19:51,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:19:51,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:19:51,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:19:51,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:19:51,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:19:51,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:19:51,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:19:51,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:19:51,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:19:51,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 03:19:51,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:19:51,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:19:51,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:19:51,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:19:51,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:19:51,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:19:51,734 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:19:51,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:19:51,734 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:19:51,734 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:19:51,735 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:19:51,735 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:19:51,735 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:19:51,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:19:51,735 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:19:51,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:19:51,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:19:51,736 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:19:51,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:19:51,736 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:19:51,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:19:51,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:19:51,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:19:51,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:19:51,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:19:51,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:19:51,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:19:51,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:19:51,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:19:51,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:19:51,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:19:51,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:19:51,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:19:51,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:19:51,738 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:19:51,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:19:51,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:19:51,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:19:51,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:19:51,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:19:51,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:19:51,739 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_7495cf81-661c-4561-a831-365d017a02e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2022-12-14 03:19:51,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:19:51,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:19:51,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:19:51,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:19:51,951 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:19:51,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/res2o.c [2022-12-14 03:19:54,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:19:54,676 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:19:54,677 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/sv-benchmarks/c/array-fpi/res2o.c [2022-12-14 03:19:54,682 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/data/63fc64b85/49c92ddb59304a2cbbfbc559164ebfe9/FLAGb95bebc61 [2022-12-14 03:19:55,095 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/data/63fc64b85/49c92ddb59304a2cbbfbc559164ebfe9 [2022-12-14 03:19:55,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:19:55,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:19:55,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:19:55,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:19:55,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:19:55,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47335c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55, skipping insertion in model container [2022-12-14 03:19:55,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:19:55,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:19:55,233 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_7495cf81-661c-4561-a831-365d017a02e8/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2022-12-14 03:19:55,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:19:55,259 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:19:55,269 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_7495cf81-661c-4561-a831-365d017a02e8/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2022-12-14 03:19:55,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:19:55,290 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:19:55,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55 WrapperNode [2022-12-14 03:19:55,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:19:55,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:19:55,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:19:55,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:19:55,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,322 INFO L138 Inliner]: procedures = 17, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 121 [2022-12-14 03:19:55,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:19:55,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:19:55,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:19:55,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:19:55,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,344 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:19:55,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:19:55,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:19:55,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:19:55,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (1/1) ... [2022-12-14 03:19:55,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:19:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:55,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:19:55,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:19:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:19:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:19:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 03:19:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 03:19:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 03:19:55,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:19:55,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:19:55,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 03:19:55,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 03:19:55,470 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:19:55,471 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:19:55,608 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:19:55,666 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:19:55,666 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 03:19:55,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:19:55 BoogieIcfgContainer [2022-12-14 03:19:55,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:19:55,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:19:55,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:19:55,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:19:55,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:19:55" (1/3) ... [2022-12-14 03:19:55,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b88774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:19:55, skipping insertion in model container [2022-12-14 03:19:55,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:19:55" (2/3) ... [2022-12-14 03:19:55,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b88774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:19:55, skipping insertion in model container [2022-12-14 03:19:55,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:19:55" (3/3) ... [2022-12-14 03:19:55,678 INFO L112 eAbstractionObserver]: Analyzing ICFG res2o.c [2022-12-14 03:19:55,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:19:55,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:19:55,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:19:55,749 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;@1b98b6de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:19:55,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:19:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 03:19:55,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:55,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:55,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:19:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1251409213, now seen corresponding path program 1 times [2022-12-14 03:19:55,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:55,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772199984] [2022-12-14 03:19:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:55,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:56,018 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 03:19:56,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:56,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772199984] [2022-12-14 03:19:56,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772199984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:19:56,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:19:56,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:19:56,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763255626] [2022-12-14 03:19:56,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:19:56,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:19:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:19:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:19:56,056 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:56,110 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2022-12-14 03:19:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:19:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 03:19:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:56,118 INFO L225 Difference]: With dead ends: 26 [2022-12-14 03:19:56,118 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 03:19:56,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:19:56,122 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:56,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:19:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 03:19:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 03:19:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 03:19:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-12-14 03:19:56,146 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2022-12-14 03:19:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:56,146 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-12-14 03:19:56,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-12-14 03:19:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 03:19:56,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:56,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:56,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:19:56,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:19:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash -28237853, now seen corresponding path program 1 times [2022-12-14 03:19:56,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:56,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662211556] [2022-12-14 03:19:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:56,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:56,243 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 03:19:56,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:56,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662211556] [2022-12-14 03:19:56,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662211556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:19:56,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:19:56,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:19:56,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540426896] [2022-12-14 03:19:56,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:19:56,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:19:56,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:19:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:19:56,246 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:56,285 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2022-12-14 03:19:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:19:56,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 03:19:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:56,286 INFO L225 Difference]: With dead ends: 24 [2022-12-14 03:19:56,286 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 03:19:56,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:19:56,287 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:56,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 4 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:19:56,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 03:19:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 03:19:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-12-14 03:19:56,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2022-12-14 03:19:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:56,292 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-12-14 03:19:56,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:19:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-12-14 03:19:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 03:19:56,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:56,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:56,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 03:19:56,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:19:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash -807325923, now seen corresponding path program 1 times [2022-12-14 03:19:56,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:56,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082790471] [2022-12-14 03:19:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:56,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:19:57,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:57,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082790471] [2022-12-14 03:19:57,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082790471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:19:57,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640517168] [2022-12-14 03:19:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:57,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:57,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:19:57,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:19:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 03:19:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:19:58,065 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 03:19:58,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-14 03:19:58,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:19:58,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 03:19:58,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:19:58,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 03:19:58,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 46 [2022-12-14 03:19:58,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2022-12-14 03:19:59,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2022-12-14 03:19:59,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-12-14 03:19:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:19:59,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:20:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:20:05,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640517168] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:20:05,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60490568] [2022-12-14 03:20:05,878 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 03:20:05,879 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:20:05,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:20:05,885 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:20:05,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:20:05,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:05,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:05,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,079 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-12-14 03:20:06,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-12-14 03:20:06,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,123 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:20:06,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 03:20:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,319 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-12-14 03:20:06,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-12-14 03:20:06,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 03:20:06,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:06,624 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-12-14 03:20:06,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-12-14 03:20:06,781 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 03:20:06,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:06,834 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:20:06,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:20:06,861 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 03:20:06,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:06,908 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:20:06,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:20:06,951 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 03:20:06,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:06,981 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:20:06,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:20:07,042 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:07,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:07,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:07,100 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:20:07,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:20:07,158 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:07,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:07,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:07,222 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:20:07,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:20:07,289 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:07,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:07,307 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:07,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '281#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 03:20:07,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:07,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:20:07,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-12-14 03:20:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915644582] [2022-12-14 03:20:07,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:07,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 03:20:07,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 03:20:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1562, Unknown=1, NotChecked=0, Total=1806 [2022-12-14 03:20:07,919 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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 03:20:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:09,008 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-12-14 03:20:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 03:20:09,009 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 03:20:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:09,009 INFO L225 Difference]: With dead ends: 25 [2022-12-14 03:20:09,009 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 03:20:09,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=363, Invalid=2086, Unknown=1, NotChecked=0, Total=2450 [2022-12-14 03:20:09,012 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:09,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:20:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 03:20:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-12-14 03:20:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 03:20:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-12-14 03:20:09,019 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 16 [2022-12-14 03:20:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:09,019 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-12-14 03:20:09,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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 03:20:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-12-14 03:20:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 03:20:09,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:09,020 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:09,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:20:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:09,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:20:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:09,224 INFO L85 PathProgramCache]: Analyzing trace with hash 185398045, now seen corresponding path program 2 times [2022-12-14 03:20:09,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:09,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372571026] [2022-12-14 03:20:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:20:09,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:20:09,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372571026] [2022-12-14 03:20:09,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372571026] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:20:09,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195375288] [2022-12-14 03:20:09,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:20:09,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:09,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:09,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:20:09,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 03:20:09,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:20:09,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 03:20:09,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:20:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:20:09,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:20:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:20:09,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195375288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:20:09,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680447398] [2022-12-14 03:20:09,460 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 03:20:09,460 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:20:09,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:20:09,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:20:09,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:20:09,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,508 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:20:09,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 03:20:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,705 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-12-14 03:20:09,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-12-14 03:20:09,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 25 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2022-12-14 03:20:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 03:20:09,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:09,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:10,035 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-12-14 03:20:10,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-12-14 03:20:10,156 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 03:20:10,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:10,202 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:20:10,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:20:10,231 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 03:20:10,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:10,273 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:20:10,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:20:10,307 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 03:20:10,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:10,336 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:20:10,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:20:10,376 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:10,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:10,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:10,431 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 03:20:10,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 03:20:10,498 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:10,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:10,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:10,553 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 03:20:10,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 03:20:10,627 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:10,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:10,656 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:10,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '485#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 03:20:10,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:10,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:20:10,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-14 03:20:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531977681] [2022-12-14 03:20:10,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:10,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 03:20:10,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:10,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 03:20:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-14 03:20:10,980 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:11,087 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-12-14 03:20:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:20:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 03:20:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:11,088 INFO L225 Difference]: With dead ends: 57 [2022-12-14 03:20:11,088 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 03:20:11,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 03:20:11,089 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:11,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:20:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 03:20:11,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-12-14 03:20:11,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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 03:20:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-12-14 03:20:11,094 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2022-12-14 03:20:11,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:11,094 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-12-14 03:20:11,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-12-14 03:20:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 03:20:11,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:11,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:11,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 03:20:11,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:11,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:20:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:11,296 INFO L85 PathProgramCache]: Analyzing trace with hash 795195426, now seen corresponding path program 3 times [2022-12-14 03:20:11,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:11,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539137393] [2022-12-14 03:20:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:11,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 03:20:11,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:20:11,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539137393] [2022-12-14 03:20:11,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539137393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:20:11,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505479680] [2022-12-14 03:20:11,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:20:11,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:11,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:11,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:11,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:20:11,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:20:11,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:20:11,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 03:20:11,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:20:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 03:20:11,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:20:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 03:20:11,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505479680] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:20:11,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554158407] [2022-12-14 03:20:11,530 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 03:20:11,530 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:20:11,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:20:11,530 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:20:11,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:20:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,571 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:20:11,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 03:20:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,737 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-12-14 03:20:11,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-12-14 03:20:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:11,958 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-12-14 03:20:11,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-12-14 03:20:12,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 03:20:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:12,202 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-12-14 03:20:12,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-12-14 03:20:12,301 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 03:20:12,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:12,341 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:20:12,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:20:12,372 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 03:20:12,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:12,411 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:20:12,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:20:12,441 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 03:20:12,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:12,474 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:20:12,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:20:12,529 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:12,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:12,583 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:20:12,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:20:12,630 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:12,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:12,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:12,689 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 03:20:12,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 03:20:12,755 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:20:12,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:20:12,776 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:13,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '761#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 03:20:13,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:13,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:20:13,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-14 03:20:13,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350835145] [2022-12-14 03:20:13,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:13,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 03:20:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:13,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 03:20:13,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-14 03:20:13,161 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:13,274 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-12-14 03:20:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 03:20:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 03:20:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:13,275 INFO L225 Difference]: With dead ends: 28 [2022-12-14 03:20:13,275 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 03:20:13,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-14 03:20:13,276 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:13,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 10 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:20:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 03:20:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 03:20:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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 03:20:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-12-14 03:20:13,282 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-12-14 03:20:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:13,282 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-12-14 03:20:13,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:20:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-12-14 03:20:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 03:20:13,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:13,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:13,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:20:13,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:13,484 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:20:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash -418289731, now seen corresponding path program 4 times [2022-12-14 03:20:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:13,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743370771] [2022-12-14 03:20:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:13,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:20:15,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:20:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743370771] [2022-12-14 03:20:15,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743370771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:20:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117664176] [2022-12-14 03:20:15,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:20:15,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:15,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:15,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:15,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:20:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:20:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 03:20:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:20:15,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:20:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:15,965 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 03:20:15,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2022-12-14 03:20:16,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 03:20:16,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 03:20:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-12-14 03:20:16,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-12-14 03:20:16,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 67 [2022-12-14 03:20:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 74 [2022-12-14 03:20:16,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:20:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:16,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 87 [2022-12-14 03:20:17,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2022-12-14 03:20:17,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 82 [2022-12-14 03:20:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 81 [2022-12-14 03:20:17,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 82 [2022-12-14 03:20:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:17,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-12-14 03:20:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:20:20,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-12-14 03:20:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:20:20,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:22:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:22:57,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117664176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:22:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200663732] [2022-12-14 03:22:57,533 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 03:22:57,533 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:22:57,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:22:57,533 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:22:57,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:22:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,686 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-12-14 03:22:57,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-12-14 03:22:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,719 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:22:57,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 03:22:57,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,895 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-12-14 03:22:57,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-12-14 03:22:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:57,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 03:22:58,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:22:58,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:22:58,128 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-12-14 03:22:58,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-12-14 03:22:58,222 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 03:22:58,232 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 03:22:58,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 73 [2022-12-14 03:22:58,274 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 03:22:58,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:22:58,310 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:22:58,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:22:58,331 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 03:22:58,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:22:58,358 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:22:58,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:22:58,406 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:22:58,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:22:58,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:22:58,458 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 03:22:58,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 03:22:58,509 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:22:58,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:22:58,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:22:58,557 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 03:22:58,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 03:22:58,609 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:22:58,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:22:58,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:23:01,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1044#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 03:23:01,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:23:01,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:23:01,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 57 [2022-12-14 03:23:01,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788175865] [2022-12-14 03:23:01,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:23:01,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 03:23:01,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:23:01,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 03:23:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3276, Unknown=54, NotChecked=0, Total=3660 [2022-12-14 03:23:01,140 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:24:08,293 WARN L233 SmtUtils]: Spent 34.12s on a formula simplification. DAG size of input: 190 DAG size of output: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:24:10,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:24:12,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:24:14,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:24:16,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:24:19,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:24:21,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:24:23,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:24:25,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:24:27,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:24:28,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:24:33,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:25:50,492 WARN L233 SmtUtils]: Spent 45.91s on a formula simplification. DAG size of input: 199 DAG size of output: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:25:59,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:01,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:03,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:07,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:26:09,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:11,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:13,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:17,350 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse13 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|)) (.cse27 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse7 (* 3 |c_ULTIMATE.start_main_~i~0#1|)) (.cse6 (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4)) (.cse11 (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse28 (* c_~N~0 3)) (.cse29 (= (select .cse27 0) 1)) (.cse8 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse1 (= (select .cse13 4) 1)) (.cse12 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (or (<= (+ .cse0 |c_ULTIMATE.start_main_~c~0#1.offset| 1) (* c_~N~0 4)) .cse1) (= (select .cse2 0) 1) (forall ((v_ArrVal_335 Int) (v_ArrVal_345 Int) (v_ArrVal_333 Int) (v_ArrVal_343 Int) (v_ArrVal_342 Int) (v_ArrVal_353 Int) (v_ArrVal_352 Int) (v_ArrVal_340 Int) (v_ArrVal_350 Int) (v_ArrVal_338 Int) (v_ArrVal_347 Int)) (let ((.cse3 (let ((.cse9 (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse11 v_ArrVal_333) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_335)))) (store .cse10 |c_ULTIMATE.start_main_~b~0#1.base| (store (store (select .cse10 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| v_ArrVal_338) .cse8 v_ArrVal_340))))) (store .cse9 |c_ULTIMATE.start_main_~c~0#1.base| (store (store (select .cse9 |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| v_ArrVal_342) .cse6 v_ArrVal_343))))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_333 1)) (not (<= v_ArrVal_343 1)) (not (<= v_ArrVal_347 (+ v_ArrVal_345 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_345)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5)))) (< (+ v_ArrVal_353 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_353)) |c_ULTIMATE.start_main_~c~0#1.base|) .cse6)) (+ 7 .cse7)) (not (<= v_ArrVal_340 1)) (not (<= v_ArrVal_350 (+ v_ArrVal_347 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_347)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_345 (+ (select (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (not (<= v_ArrVal_342 1)) (not (<= v_ArrVal_352 (+ v_ArrVal_350 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_350)) |c_ULTIMATE.start_main_~b~0#1.base|) .cse8)))) (not (<= v_ArrVal_335 1)) (not (<= v_ArrVal_338 1)) (not (<= v_ArrVal_353 (+ v_ArrVal_352 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_352)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))))))) (= .cse12 0) (<= (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (<= (select .cse13 |c_ULTIMATE.start_main_~c~0#1.offset|) 1) (<= (select .cse13 .cse6) 1) (forall ((v_ArrVal_335 Int) (v_ArrVal_345 Int) (v_ArrVal_343 Int) (v_ArrVal_342 Int) (v_ArrVal_353 Int) (v_ArrVal_352 Int) (v_ArrVal_340 Int) (v_ArrVal_350 Int) (v_ArrVal_338 Int) (v_ArrVal_347 Int)) (let ((.cse14 (let ((.cse16 (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse2 .cse11 v_ArrVal_335)))) (store .cse17 |c_ULTIMATE.start_main_~b~0#1.base| (store (store (select .cse17 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| v_ArrVal_338) .cse8 v_ArrVal_340))))) (store .cse16 |c_ULTIMATE.start_main_~c~0#1.base| (store (store (select .cse16 |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| v_ArrVal_342) .cse6 v_ArrVal_343))))) (let ((.cse15 (select .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_347 (+ v_ArrVal_345 (select (select (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_345)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5)))) (not (<= v_ArrVal_352 (+ v_ArrVal_350 (select (select (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_350)) |c_ULTIMATE.start_main_~b~0#1.base|) .cse8)))) (not (<= v_ArrVal_343 1)) (not (<= v_ArrVal_350 (+ v_ArrVal_347 (select (select (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_347)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_340 1)) (not (<= v_ArrVal_353 (+ v_ArrVal_352 (select (select (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_352)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (< (+ (select (select (store .cse14 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_353)) |c_ULTIMATE.start_main_~c~0#1.base|) .cse6) v_ArrVal_353) (+ .cse7 4)) (not (<= v_ArrVal_342 1)) (not (<= v_ArrVal_335 1)) (not (<= v_ArrVal_338 1)) (not (<= v_ArrVal_345 (+ (select .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse14 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))))))) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (let ((.cse22 (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (.cse23 (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse18 (select .cse23 4)) (.cse21 (select .cse23 0)) (.cse19 (select .cse22 0)) (.cse20 (select .cse22 4))) (and (not (= |ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (<= (+ 2 |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (<= .cse12 (+ .cse18 .cse19 .cse20 .cse21)) (<= .cse18 1) (<= .cse21 1) (not (= |ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (not (= |ULTIMATE.start_main_~b~0#1.base| |ULTIMATE.start_main_~a~0#1.base|)) (<= .cse19 1) (<= .cse20 1) (not (= |ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)))))) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (let ((.cse26 (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse24 (select .cse26 0)) (.cse25 (select .cse26 4))) (and (not (= |c_ULTIMATE.start_main_~b~0#1.base| |ULTIMATE.start_main_~a~0#1.base|)) (not (= |ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (<= .cse12 (+ .cse24 .cse25)) (<= .cse24 1) (<= .cse25 1) (not (= |ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)))))) (= (select .cse2 4) 1) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select .cse13 0) 1) (<= (select .cse2 .cse5) 1) (= (select .cse27 4) 1) (or (and (<= (+ .cse12 4) .cse28) .cse29) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (< 1 c_~N~0) (<= (+ |c_ULTIMATE.start_main_~b~0#1.base| 2) |c_ULTIMATE.start_main_~#sum~0#1.base|) (<= 2 c_~N~0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (<= .cse12 0) (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (<= (+ .cse12 2) .cse28) .cse29 (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select .cse27 .cse8) 1) .cse1 (<= (select .cse27 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (exists ((|ULTIMATE.start_main_~c~0#1.base| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (let ((.cse36 (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (.cse37 (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|)) (.cse38 (select |c_#memory_int| |ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse31 (select .cse38 4)) (.cse32 (select .cse37 4)) (.cse30 (select .cse38 0)) (.cse35 (select .cse37 0)) (.cse33 (select .cse36 0)) (.cse34 (select .cse36 4))) (and (<= (+ 2 |ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (<= .cse12 (+ .cse30 .cse31 .cse32 .cse33 .cse34 .cse35)) (<= .cse31 1) (<= .cse32 1) (<= .cse30 1) (not (= |ULTIMATE.start_main_~c~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (<= .cse35 1) (not (= |ULTIMATE.start_main_~c~0#1.base| |ULTIMATE.start_main_~b~0#1.base|)) (not (= |ULTIMATE.start_main_~b~0#1.base| |ULTIMATE.start_main_~a~0#1.base|)) (not (= |ULTIMATE.start_main_~c~0#1.base| |ULTIMATE.start_main_~a~0#1.base|)) (<= .cse33 1) (<= .cse34 1) (not (= |ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|))))))))) is different from false [2022-12-14 03:26:28,596 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 191 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:26:52,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:54,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:56,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:26:58,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:01,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:03,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:05,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:06,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:08,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:10,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:22,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:25,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:26,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:29,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:31,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 03:27:56,850 WARN L233 SmtUtils]: Spent 14.48s on a formula simplification. DAG size of input: 224 DAG size of output: 204 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:28:28,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:30,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:32,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:34,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:36,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:38,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:40,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:42,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:46,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:48,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:50,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:52,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:54,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:57,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:28:59,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:29:01,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:29:03,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:29:05,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:29:07,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:29:09,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:29:11,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:29:13,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 03:29:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:29:20,027 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2022-12-14 03:29:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 03:29:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 03:29:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:29:20,029 INFO L225 Difference]: With dead ends: 68 [2022-12-14 03:29:20,029 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 03:29:20,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 417.4s TimeCoverageRelationStatistics Valid=732, Invalid=7010, Unknown=94, NotChecked=174, Total=8010 [2022-12-14 03:29:20,030 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 86 mSolverCounterUnsat, 49 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 49 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 123.7s IncrementalHoareTripleChecker+Time [2022-12-14 03:29:20,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 53 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 732 Invalid, 49 Unknown, 2 Unchecked, 123.7s Time] [2022-12-14 03:29:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 03:29:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2022-12-14 03:29:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 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 03:29:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2022-12-14 03:29:20,048 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 22 [2022-12-14 03:29:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:29:20,048 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2022-12-14 03:29:20,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:29:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2022-12-14 03:29:20,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 03:29:20,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:29:20,049 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:29:20,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:29:20,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 03:29:20,250 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:29:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:29:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash -166007597, now seen corresponding path program 5 times [2022-12-14 03:29:20,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:29:20,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004514064] [2022-12-14 03:29:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:29:20,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:29:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:29:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:29:20,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:29:20,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004514064] [2022-12-14 03:29:20,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004514064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:29:20,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281617763] [2022-12-14 03:29:20,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:29:20,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:29:20,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:29:20,346 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:29:20,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:29:20,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:29:20,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:29:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 03:29:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:29:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:29:20,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:29:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:29:20,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281617763] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:29:20,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061034143] [2022-12-14 03:29:20,603 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 03:29:20,603 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:29:20,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:29:20,603 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:29:20,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:29:20,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,639 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 03:29:20,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 03:29:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,797 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-12-14 03:29:20,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-12-14 03:29:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:20,967 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-12-14 03:29:20,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-12-14 03:29:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 03:29:21,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:21,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:21,213 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-12-14 03:29:21,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-12-14 03:29:21,329 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 03:29:21,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:29:21,372 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:29:21,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:29:21,398 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 03:29:21,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:29:21,441 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:29:21,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:29:21,476 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 03:29:21,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:21,510 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:29:21,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:29:21,567 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:29:21,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:29:21,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:21,614 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 03:29:21,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 03:29:21,678 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:29:21,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:29:21,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:21,738 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:29:21,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:29:21,793 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:29:21,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:29:21,808 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:29:22,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1454#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 03:29:22,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:29:22,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:29:22,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-14 03:29:22,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751402247] [2022-12-14 03:29:22,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:29:22,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 03:29:22,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:29:22,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 03:29:22,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-12-14 03:29:22,143 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:29:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:29:22,291 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2022-12-14 03:29:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 03:29:22,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 03:29:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:29:22,292 INFO L225 Difference]: With dead ends: 83 [2022-12-14 03:29:22,292 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 03:29:22,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-12-14 03:29:22,293 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:29:22,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 14 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:29:22,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 03:29:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-12-14 03:29:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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 03:29:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-12-14 03:29:22,313 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2022-12-14 03:29:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:29:22,313 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-12-14 03:29:22,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:29:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-12-14 03:29:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 03:29:22,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:29:22,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:29:22,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 03:29:22,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 03:29:22,515 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:29:22,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:29:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -921810152, now seen corresponding path program 6 times [2022-12-14 03:29:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:29:22,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586630284] [2022-12-14 03:29:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:29:22,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:29:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:29:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 03:29:22,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:29:22,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586630284] [2022-12-14 03:29:22,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586630284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:29:22,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061444824] [2022-12-14 03:29:22,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:29:22,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:29:22,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:29:22,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:29:22,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:29:22,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:29:22,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:29:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 03:29:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:29:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 03:29:22,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:29:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 03:29:22,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061444824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:29:22,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616269562] [2022-12-14 03:29:22,835 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 03:29:22,835 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:29:22,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:29:22,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:29:22,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:29:22,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:22,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:22,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:22,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,028 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-12-14 03:29:23,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-12-14 03:29:23,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 03:29:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 25 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2022-12-14 03:29:23,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 03:29:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:23,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:23,308 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-12-14 03:29:23,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-12-14 03:29:23,413 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 03:29:23,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:29:23,449 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 03:29:23,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-12-14 03:29:23,474 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 03:29:23,486 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 03:29:23,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 73 [2022-12-14 03:29:23,529 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 03:29:23,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:23,560 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:29:23,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:29:23,617 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:29:23,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:29:23,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:23,680 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 03:29:23,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 03:29:23,741 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:29:23,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:29:23,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:23,795 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 03:29:23,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 03:29:23,853 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 03:29:23,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 03:29:23,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:29:24,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1837#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 03:29:24,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:29:24,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:29:24,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-14 03:29:24,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419646473] [2022-12-14 03:29:24,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:29:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 03:29:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:29:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 03:29:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-14 03:29:24,363 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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 03:29:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:29:24,499 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-12-14 03:29:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:29:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 03:29:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:29:24,500 INFO L225 Difference]: With dead ends: 35 [2022-12-14 03:29:24,500 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 03:29:24,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 16 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-12-14 03:29:24,501 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:29:24,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:29:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 03:29:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 03:29:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:29:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-12-14 03:29:24,513 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 26 [2022-12-14 03:29:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:29:24,513 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-12-14 03:29:24,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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 03:29:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-12-14 03:29:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 03:29:24,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:29:24,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:29:24,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 03:29:24,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:29:24,716 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:29:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:29:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash 596492701, now seen corresponding path program 7 times [2022-12-14 03:29:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:29:24,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577487442] [2022-12-14 03:29:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:29:24,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:29:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:29:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:29:27,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:29:27,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577487442] [2022-12-14 03:29:27,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577487442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:29:27,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213731783] [2022-12-14 03:29:27,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:29:27,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:29:27,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:29:27,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:29:27,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7495cf81-661c-4561-a831-365d017a02e8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:29:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:29:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 123 conjunts are in the unsatisfiable core [2022-12-14 03:29:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:29:27,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 03:29:27,906 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 03:29:27,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-14 03:29:27,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 03:29:28,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 03:29:28,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-12-14 03:29:28,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-12-14 03:29:28,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 64 [2022-12-14 03:29:28,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 76 [2022-12-14 03:29:28,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:28,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 86 [2022-12-14 03:29:29,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 101 [2022-12-14 03:29:29,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 110 [2022-12-14 03:29:29,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 123 [2022-12-14 03:29:29,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 118 [2022-12-14 03:29:29,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:29,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 116 [2022-12-14 03:29:30,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:30,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 122 [2022-12-14 03:29:30,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:29:30,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 126 [2022-12-14 03:29:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 115 [2022-12-14 03:29:30,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:30,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 116 [2022-12-14 03:29:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:29:31,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 117 [2022-12-14 03:29:31,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 114 [2022-12-14 03:29:31,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 43 [2022-12-14 03:29:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:29:31,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:32:30,036 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (v_ArrVal_675 Int) (v_ArrVal_663 Int) (v_ArrVal_673 Int) (v_ArrVal_672 Int) (v_ArrVal_682 Int) (v_ArrVal_670 Int) (v_ArrVal_680 Int) (v_ArrVal_668 Int) (v_ArrVal_678 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_663) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset| 4) v_ArrVal_665))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_682 (+ v_ArrVal_680 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_680)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4))))) (not (<= v_ArrVal_673 (+ v_ArrVal_672 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_672)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_678 (+ v_ArrVal_675 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_675)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (not (<= v_ArrVal_672 (+ v_ArrVal_670 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_670)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_670 (+ v_ArrVal_668 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_668)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_675 (+ v_ArrVal_673 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_673)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (< (+ v_ArrVal_682 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_682)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (+ (* c_~N~0 3) 1)) (not (<= v_ArrVal_663 1)) (not (<= v_ArrVal_668 (+ (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= v_ArrVal_680 (+ v_ArrVal_678 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_678)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (not (<= v_ArrVal_665 1)))))) is different from false [2022-12-14 03:32:32,998 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (v_ArrVal_675 Int) (v_ArrVal_663 Int) (v_ArrVal_662 Int) (v_ArrVal_673 Int) (v_ArrVal_672 Int) (v_ArrVal_682 Int) (v_ArrVal_670 Int) (v_ArrVal_680 Int) (v_ArrVal_668 Int) (v_ArrVal_678 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_662) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset| 4) v_ArrVal_663) (+ .cse2 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_665))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_675 (+ v_ArrVal_673 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_673)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (not (<= v_ArrVal_672 (+ v_ArrVal_670 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_670)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_670 (+ v_ArrVal_668 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_668)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_682 (+ v_ArrVal_680 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_680)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4))))) (< (+ v_ArrVal_682 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_682)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (+ (* c_~N~0 3) 1)) (not (<= v_ArrVal_673 (+ v_ArrVal_672 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_672)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_662 1)) (not (<= v_ArrVal_668 (+ (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (not (<= v_ArrVal_663 1)) (not (<= v_ArrVal_680 (+ v_ArrVal_678 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_678)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (not (<= v_ArrVal_665 1)) (not (<= v_ArrVal_678 (+ v_ArrVal_675 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_675)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))))))))) is different from false