./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:43:54,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:43:54,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:43:54,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:43:54,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:43:54,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:43:54,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:43:54,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:43:54,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:43:54,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:43:54,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:43:54,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:43:54,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:43:54,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:43:54,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:43:54,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:43:54,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:43:54,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:43:54,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:43:54,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:43:54,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:43:54,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:43:54,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:43:54,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:43:54,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:43:54,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:43:54,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:43:54,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:43:54,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:43:54,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:43:54,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:43:54,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:43:54,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:43:54,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:43:54,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:43:54,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:43:54,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:43:54,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:43:54,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:43:54,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:43:54,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:43:54,411 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:43:54,456 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:43:54,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:43:54,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:43:54,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:43:54,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:43:54,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:43:54,458 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:43:54,459 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:43:54,459 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:43:54,459 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:43:54,460 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:43:54,460 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:43:54,460 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:43:54,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:43:54,461 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:43:54,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:43:54,461 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:43:54,461 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:43:54,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:43:54,462 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:43:54,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:43:54,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:43:54,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:43:54,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:43:54,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:43:54,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:43:54,464 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:43:54,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:43:54,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:43:54,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:43:54,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:43:54,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:43:54,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:43:54,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:43:54,466 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:43:54,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:43:54,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:43:54,466 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:43:54,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:43:54,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:43:54,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:43:54,467 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_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2022-11-26 00:43:54,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:43:54,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:43:54,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:43:54,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:43:54,801 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:43:54,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2022-11-26 00:43:57,784 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:43:58,018 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:43:58,019 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2022-11-26 00:43:58,026 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/data/f6bd7011f/a78d47bbdcfc430cb7abb98ccf457de8/FLAG682c4e2ee [2022-11-26 00:43:58,042 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/data/f6bd7011f/a78d47bbdcfc430cb7abb98ccf457de8 [2022-11-26 00:43:58,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:43:58,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:43:58,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:43:58,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:43:58,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:43:58,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e0426f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58, skipping insertion in model container [2022-11-26 00:43:58,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:43:58,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:43:58,294 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_11e006c4-1bd5-486f-baf3-f035782db909/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2022-11-26 00:43:58,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:43:58,351 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:43:58,369 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_11e006c4-1bd5-486f-baf3-f035782db909/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2022-11-26 00:43:58,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:43:58,419 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:43:58,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58 WrapperNode [2022-11-26 00:43:58,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:43:58,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:43:58,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:43:58,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:43:58,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,477 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2022-11-26 00:43:58,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:43:58,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:43:58,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:43:58,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:43:58,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,522 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:43:58,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:43:58,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:43:58,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:43:58,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (1/1) ... [2022-11-26 00:43:58,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:43:58,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:58,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:43:58,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:43:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:43:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:43:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:43:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:43:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:43:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:43:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:43:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:43:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:43:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:43:58,685 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:43:58,687 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:43:58,901 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:43:59,085 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:43:59,085 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-26 00:43:59,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:43:59 BoogieIcfgContainer [2022-11-26 00:43:59,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:43:59,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:43:59,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:43:59,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:43:59,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:43:58" (1/3) ... [2022-11-26 00:43:59,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28181cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:43:59, skipping insertion in model container [2022-11-26 00:43:59,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:43:58" (2/3) ... [2022-11-26 00:43:59,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28181cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:43:59, skipping insertion in model container [2022-11-26 00:43:59,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:43:59" (3/3) ... [2022-11-26 00:43:59,112 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2022-11-26 00:43:59,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:43:59,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:43:59,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:43:59,194 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;@1501d561, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:43:59,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:43:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:43:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:43:59,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:59,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:59,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash 825226196, now seen corresponding path program 1 times [2022-11-26 00:43:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:59,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444542777] [2022-11-26 00:43:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:59,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:59,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444542777] [2022-11-26 00:43:59,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444542777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:59,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:59,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:43:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133914829] [2022-11-26 00:43:59,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:59,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:43:59,537 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:59,634 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2022-11-26 00:43:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:43:59,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:43:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:59,644 INFO L225 Difference]: With dead ends: 57 [2022-11-26 00:43:59,644 INFO L226 Difference]: Without dead ends: 35 [2022-11-26 00:43:59,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:43:59,650 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:59,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:43:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-26 00:43:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2022-11-26 00:43:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:43:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2022-11-26 00:43:59,688 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 8 [2022-11-26 00:43:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:59,689 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2022-11-26 00:43:59,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2022-11-26 00:43:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:43:59,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:59,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:59,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:43:59,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash -224566578, now seen corresponding path program 1 times [2022-11-26 00:43:59,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:59,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306436633] [2022-11-26 00:43:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:59,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:59,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306436633] [2022-11-26 00:43:59,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306436633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:59,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931512029] [2022-11-26 00:43:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:59,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:59,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:59,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:59,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:43:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:59,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:59,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:59,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931512029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870021953] [2022-11-26 00:43:59,983 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:43:59,984 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:59,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:59,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:00,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:00,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:00,092 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:44:00,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:44:00,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:00,127 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:00,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:00,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:44:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:00,319 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:44:00,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:44:00,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:00,435 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:00,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [870021953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:00,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:00,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2022-11-26 00:44:00,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729671125] [2022-11-26 00:44:00,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:00,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:00,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:00,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:00,478 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:00,568 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2022-11-26 00:44:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:44:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:44:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:00,569 INFO L225 Difference]: With dead ends: 43 [2022-11-26 00:44:00,569 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:44:00,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:00,571 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:00,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:44:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-26 00:44:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-26 00:44:00,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2022-11-26 00:44:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:00,578 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-26 00:44:00,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-26 00:44:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:44:00,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:00,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:00,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:44:00,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:00,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash -747487474, now seen corresponding path program 1 times [2022-11-26 00:44:00,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:00,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693907405] [2022-11-26 00:44:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:00,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:44:00,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:00,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693907405] [2022-11-26 00:44:00,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693907405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63780711] [2022-11-26 00:44:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:00,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:00,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:00,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:00,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:44:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:01,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:44:01,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:44:01,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:01,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63780711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:01,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:01,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-26 00:44:01,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2310922] [2022-11-26 00:44:01,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:01,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:01,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:01,043 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:01,095 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-11-26 00:44:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:01,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:44:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:01,098 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:44:01,098 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:44:01,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:01,105 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:01,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:44:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:44:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-26 00:44:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-26 00:44:01,120 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2022-11-26 00:44:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:01,121 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-26 00:44:01,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-26 00:44:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:44:01,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:01,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:01,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:01,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-26 00:44:01,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:01,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1790313624, now seen corresponding path program 1 times [2022-11-26 00:44:01,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:01,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991063613] [2022-11-26 00:44:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:01,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:44:01,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:01,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991063613] [2022-11-26 00:44:01,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991063613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100371118] [2022-11-26 00:44:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:01,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:01,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:44:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:44:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:44:01,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:44:01,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100371118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:01,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972056513] [2022-11-26 00:44:01,603 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:44:01,603 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:01,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:01,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:01,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:01,656 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:01,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:01,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:01,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:44:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:01,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:44:01,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:01,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:01,818 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:44:01,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:44:01,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:01,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:01,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:01,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:44:02,051 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:44:02,052 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 118 treesize of output 119 [2022-11-26 00:44:02,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:02,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:02,209 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:44:02,210 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 40 treesize of output 30 [2022-11-26 00:44:02,491 INFO L321 Elim1Store]: treesize reduction 143, result has 33.8 percent of original size [2022-11-26 00:44:02,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 232 [2022-11-26 00:44:03,064 INFO L321 Elim1Store]: treesize reduction 143, result has 33.8 percent of original size [2022-11-26 00:44:03,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 232 [2022-11-26 00:44:03,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:04,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [972056513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:04,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:04,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2022-11-26 00:44:04,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907312561] [2022-11-26 00:44:04,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:04,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:44:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:04,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:44:04,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:44:04,186 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:04,508 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-11-26 00:44:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:44:04,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:44:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:04,509 INFO L225 Difference]: With dead ends: 44 [2022-11-26 00:44:04,509 INFO L226 Difference]: Without dead ends: 30 [2022-11-26 00:44:04,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:44:04,510 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:04,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-26 00:44:04,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-11-26 00:44:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-26 00:44:04,518 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2022-11-26 00:44:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:04,519 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-26 00:44:04,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-26 00:44:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:44:04,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:04,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:04,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:04,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:04,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash 457595505, now seen corresponding path program 1 times [2022-11-26 00:44:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:04,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549712632] [2022-11-26 00:44:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:04,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:44:04,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:04,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549712632] [2022-11-26 00:44:04,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549712632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:04,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131573791] [2022-11-26 00:44:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:04,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:04,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:04,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:44:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:44:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:44:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:44:04,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131573791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:04,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113815117] [2022-11-26 00:44:04,994 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:04,994 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:04,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:04,995 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:04,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:05,023 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:05,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:05,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:05,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:44:05,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:05,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:44:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:05,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:05,130 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:44:05,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:44:05,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:05,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:05,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:05,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:05,275 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 128 treesize of output 118 [2022-11-26 00:44:05,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:05,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:05,517 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:44:05,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:44:06,152 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:06,153 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 28 treesize of output 27 [2022-11-26 00:44:06,345 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:06,345 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:07,050 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:07,051 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:07,349 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:44:07,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:08,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '796#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) 4))) 1 0) |__VERIFIER_assert_#in~cond|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:08,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:08,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:08,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-26 00:44:08,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873628342] [2022-11-26 00:44:08,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:08,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:08,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:08,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:08,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:44:08,367 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:08,435 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-11-26 00:44:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:44:08,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:44:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:08,436 INFO L225 Difference]: With dead ends: 66 [2022-11-26 00:44:08,436 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:44:08,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:44:08,437 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:08,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:44:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2022-11-26 00:44:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-26 00:44:08,447 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2022-11-26 00:44:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:08,447 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-26 00:44:08,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-26 00:44:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:44:08,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:08,448 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:08,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:08,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:08,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash 930745131, now seen corresponding path program 2 times [2022-11-26 00:44:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:08,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478907781] [2022-11-26 00:44:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:08,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:44:08,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478907781] [2022-11-26 00:44:08,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478907781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161165831] [2022-11-26 00:44:08,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:44:08,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:08,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:08,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:08,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:44:08,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:44:08,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:44:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:44:08,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:44:08,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161165831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:08,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882760823] [2022-11-26 00:44:08,844 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:08,844 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:08,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:08,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:08,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:08,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:08,878 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:08,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:08,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:08,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:44:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:08,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:44:08,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:08,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:08,963 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:44:08,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:44:09,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:09,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:09,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:09,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:09,066 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 128 treesize of output 118 [2022-11-26 00:44:09,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:09,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:09,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:09,287 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:44:09,287 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 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:44:09,815 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:09,817 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 28 treesize of output 27 [2022-11-26 00:44:10,037 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:10,038 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:10,532 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:10,533 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:10,975 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:44:10,986 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:11,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1109#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) 4))) 1 0)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:11,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:11,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:11,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 00:44:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285652177] [2022-11-26 00:44:11,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:44:11,962 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:12,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:12,039 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2022-11-26 00:44:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:44:12,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:44:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:12,041 INFO L225 Difference]: With dead ends: 66 [2022-11-26 00:44:12,041 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 00:44:12,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:44:12,042 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:12,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 00:44:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-26 00:44:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2022-11-26 00:44:12,053 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2022-11-26 00:44:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:12,054 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2022-11-26 00:44:12,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2022-11-26 00:44:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:44:12,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:12,055 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:12,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:12,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:12,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1985012685, now seen corresponding path program 3 times [2022-11-26 00:44:12,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:12,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000196814] [2022-11-26 00:44:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:12,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:44:12,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000196814] [2022-11-26 00:44:12,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000196814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311028628] [2022-11-26 00:44:12,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:44:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:12,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:12,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:44:12,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:44:12,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:44:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:44:12,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:44:12,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311028628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [973934346] [2022-11-26 00:44:12,632 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:12,632 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:12,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:12,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:12,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:12,671 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:44:12,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:44:12,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:12,694 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:12,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:12,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:44:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:12,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:12,782 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:44:12,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:44:12,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:12,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:12,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:12,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:12,910 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 128 treesize of output 118 [2022-11-26 00:44:12,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:13,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:13,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:13,088 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:44:13,088 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 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:44:13,440 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:13,441 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 28 treesize of output 27 [2022-11-26 00:44:13,602 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:13,603 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 28 treesize of output 27 [2022-11-26 00:44:13,700 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:13,701 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 28 treesize of output 27 [2022-11-26 00:44:13,811 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2022-11-26 00:44:13,832 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:15,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1516#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3|) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| 2147483647) (= (select (select |#memory_int| |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1|) (+ (- 4) (* |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| 4))) (select (select |#memory_int| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| 4) (- 4)))) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1|) 4) (select (select |#memory_int| |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1|) 0))) 1 0) |__VERIFIER_assert_#in~cond|) (< 1 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3|) (<= 0 |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1|) (<= 0 |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:15,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:15,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:15,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-26 00:44:15,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452431711] [2022-11-26 00:44:15,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:15,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:44:15,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:15,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:44:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:44:15,389 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:15,518 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2022-11-26 00:44:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:44:15,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-26 00:44:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:15,520 INFO L225 Difference]: With dead ends: 130 [2022-11-26 00:44:15,520 INFO L226 Difference]: Without dead ends: 91 [2022-11-26 00:44:15,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:44:15,522 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:15,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 48 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-26 00:44:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2022-11-26 00:44:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-26 00:44:15,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2022-11-26 00:44:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:15,537 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-26 00:44:15,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-26 00:44:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:44:15,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:15,538 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:15,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:15,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:15,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash 27316621, now seen corresponding path program 4 times [2022-11-26 00:44:15,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:15,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160394832] [2022-11-26 00:44:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:15,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:44:16,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:16,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160394832] [2022-11-26 00:44:16,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160394832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:16,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529517557] [2022-11-26 00:44:16,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:44:16,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:16,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:16,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:44:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:44:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:44:16,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:44:16,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529517557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609666747] [2022-11-26 00:44:16,469 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:16,469 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:16,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:16,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:16,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:16,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:16,499 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:44:16,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:44:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:16,526 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:16,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:16,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:16,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:44:16,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:16,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:16,610 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:44:16,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:44:16,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:16,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:16,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:16,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:16,751 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 128 treesize of output 118 [2022-11-26 00:44:16,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:16,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:16,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:16,933 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:44:16,933 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 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:44:17,391 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:17,391 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 28 treesize of output 27 [2022-11-26 00:44:17,578 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:17,579 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:18,519 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:18,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:18,958 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:44:18,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:19,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2099#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) 4))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:19,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:19,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:19,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-26 00:44:19,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033070484] [2022-11-26 00:44:19,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:19,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:44:19,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:19,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:44:19,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=858, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:44:19,942 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:20,253 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2022-11-26 00:44:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:44:20,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-26 00:44:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:20,257 INFO L225 Difference]: With dead ends: 190 [2022-11-26 00:44:20,257 INFO L226 Difference]: Without dead ends: 151 [2022-11-26 00:44:20,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=548, Invalid=858, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:44:20,259 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 154 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:20,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 67 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-26 00:44:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 63. [2022-11-26 00:44:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-11-26 00:44:20,295 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 38 [2022-11-26 00:44:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:20,295 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-11-26 00:44:20,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-11-26 00:44:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:44:20,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:20,305 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:20,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:20,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:44:20,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1554989811, now seen corresponding path program 5 times [2022-11-26 00:44:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:20,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266317044] [2022-11-26 00:44:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:44:21,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266317044] [2022-11-26 00:44:21,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266317044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:21,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396927245] [2022-11-26 00:44:21,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:44:21,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:21,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:21,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:21,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:44:21,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:44:21,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:44:21,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-26 00:44:21,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-26 00:44:21,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396927245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069835093] [2022-11-26 00:44:21,700 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:21,701 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:21,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:21,701 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:21,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:21,737 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:21,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:21,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:44:21,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:21,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:44:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:21,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:21,855 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:44:21,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:44:21,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:21,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:21,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:21,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:21,988 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 128 treesize of output 118 [2022-11-26 00:44:22,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:22,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:22,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:22,166 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:44:22,166 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 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:44:22,620 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:22,620 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 28 treesize of output 27 [2022-11-26 00:44:22,809 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:22,809 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:23,990 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:23,991 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:24,238 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:44:24,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:25,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2896#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) 0))) 1 0) |__VERIFIER_assert_#in~cond|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:25,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:25,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:25,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-26 00:44:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903128095] [2022-11-26 00:44:25,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:44:25,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:25,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:44:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=1643, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:44:25,298 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:25,883 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2022-11-26 00:44:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-26 00:44:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-26 00:44:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:25,885 INFO L225 Difference]: With dead ends: 245 [2022-11-26 00:44:25,885 INFO L226 Difference]: Without dead ends: 206 [2022-11-26 00:44:25,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=963, Invalid=2343, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:44:25,887 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 581 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:25,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 101 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-26 00:44:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2022-11-26 00:44:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 109 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2022-11-26 00:44:25,918 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 50 [2022-11-26 00:44:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:25,918 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2022-11-26 00:44:25,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2022-11-26 00:44:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:44:25,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:25,919 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:25,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:26,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:26,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1036958695, now seen corresponding path program 6 times [2022-11-26 00:44:26,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:26,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912796015] [2022-11-26 00:44:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:26,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:44:27,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912796015] [2022-11-26 00:44:27,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912796015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65409607] [2022-11-26 00:44:27,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:44:27,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:27,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:27,079 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:27,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:44:27,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:44:27,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:27,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:44:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:44:27,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:44:28,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65409607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:28,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747311802] [2022-11-26 00:44:28,216 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:28,216 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:28,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:28,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:28,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:28,253 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:28,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:28,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:28,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:44:28,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:28,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:44:28,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:28,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:28,341 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:44:28,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:44:28,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:28,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:28,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:28,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:28,478 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 128 treesize of output 118 [2022-11-26 00:44:28,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:28,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:28,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:28,656 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:44:28,656 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 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:44:29,121 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:29,122 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 28 treesize of output 27 [2022-11-26 00:44:29,294 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:29,295 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:30,361 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:30,361 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:30,715 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:44:30,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:31,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4074#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) 0))) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:31,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:31,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:31,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-26 00:44:31,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782962787] [2022-11-26 00:44:31,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-26 00:44:31,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-26 00:44:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=2275, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:44:31,694 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:32,374 INFO L93 Difference]: Finished difference Result 416 states and 598 transitions. [2022-11-26 00:44:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-26 00:44:32,375 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-26 00:44:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:32,378 INFO L225 Difference]: With dead ends: 416 [2022-11-26 00:44:32,378 INFO L226 Difference]: Without dead ends: 329 [2022-11-26 00:44:32,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1757, Invalid=2275, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:44:32,383 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 485 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:32,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 86 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:44:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-26 00:44:32,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 137. [2022-11-26 00:44:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.2388059701492538) internal successors, (166), 134 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 168 transitions. [2022-11-26 00:44:32,453 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 168 transitions. Word has length 75 [2022-11-26 00:44:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:32,454 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 168 transitions. [2022-11-26 00:44:32,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 168 transitions. [2022-11-26 00:44:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-26 00:44:32,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:32,457 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:32,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:32,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:44:32,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash -758359635, now seen corresponding path program 7 times [2022-11-26 00:44:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:32,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771997560] [2022-11-26 00:44:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:32,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:44:35,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:35,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771997560] [2022-11-26 00:44:35,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771997560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:35,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469331890] [2022-11-26 00:44:35,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:44:35,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:35,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:35,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:35,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:44:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:35,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:44:35,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:44:35,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:44:38,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469331890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:38,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815772848] [2022-11-26 00:44:38,816 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:38,817 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:38,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:38,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:38,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:38,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,846 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:38,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:38,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:44:38,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:44:38,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:38,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:38,925 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:44:38,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:44:38,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:39,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:39,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:39,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:39,048 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 128 treesize of output 118 [2022-11-26 00:44:39,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:39,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:39,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:39,211 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:44:39,211 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 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:44:39,590 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:39,591 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 28 treesize of output 27 [2022-11-26 00:44:39,876 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:39,876 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:40,398 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:40,399 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:40,747 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:44:40,756 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:41,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5793#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int)) (and (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) 4))) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|))) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:41,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:41,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:41,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-26 00:44:41,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218227006] [2022-11-26 00:44:41,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:41,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-26 00:44:41,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-26 00:44:41,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5982, Invalid=6900, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:44:41,815 INFO L87 Difference]: Start difference. First operand 137 states and 168 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:44,526 INFO L93 Difference]: Finished difference Result 666 states and 973 transitions. [2022-11-26 00:44:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-26 00:44:44,527 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-11-26 00:44:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:44,533 INFO L225 Difference]: With dead ends: 666 [2022-11-26 00:44:44,533 INFO L226 Difference]: Without dead ends: 579 [2022-11-26 00:44:44,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5982, Invalid=6900, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:44:44,539 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1109 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:44,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 129 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:44:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-26 00:44:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 187. [2022-11-26 00:44:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.173913043478261) internal successors, (216), 184 states have internal predecessors, (216), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2022-11-26 00:44:44,607 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 100 [2022-11-26 00:44:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:44,610 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2022-11-26 00:44:44,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2022-11-26 00:44:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-26 00:44:44,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:44,617 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:44,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-26 00:44:44,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:44,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:44:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash 622135021, now seen corresponding path program 8 times [2022-11-26 00:44:44,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:44,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804785713] [2022-11-26 00:44:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:44,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:44:52,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:52,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804785713] [2022-11-26 00:44:52,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804785713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:52,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462171509] [2022-11-26 00:44:52,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:44:52,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:52,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:52,554 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:52,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:44:53,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:44:53,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:53,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:44:53,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4996 trivial. 0 not checked. [2022-11-26 00:44:54,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4996 trivial. 0 not checked. [2022-11-26 00:44:55,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462171509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:55,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [652781235] [2022-11-26 00:44:55,080 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:44:55,080 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:55,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:55,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:55,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:55,109 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:55,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:55,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:55,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:44:55,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:55,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:44:55,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:55,191 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:44:55,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:44:55,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:55,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:44:55,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:44:55,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:44:55,296 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:44:55,297 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 118 treesize of output 119 [2022-11-26 00:44:55,342 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 16 treesize of output 12 [2022-11-26 00:44:55,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:55,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:55,477 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:44:55,477 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 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:44:55,814 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:44:55,814 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 28 treesize of output 27 [2022-11-26 00:44:56,078 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:56,078 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:57,063 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:44:57,064 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:44:57,297 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:44:57,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:58,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8384#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8| Int)) (and (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) 4))) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:58,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:58,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:58,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-26 00:44:58,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934525773] [2022-11-26 00:44:58,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:58,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-26 00:44:58,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-26 00:44:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6257, Invalid=12103, Unknown=0, NotChecked=0, Total=18360 [2022-11-26 00:44:58,671 INFO L87 Difference]: Start difference. First operand 187 states and 218 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:02,689 INFO L93 Difference]: Finished difference Result 769 states and 1089 transitions. [2022-11-26 00:45:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-26 00:45:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-11-26 00:45:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:02,693 INFO L225 Difference]: With dead ends: 769 [2022-11-26 00:45:02,694 INFO L226 Difference]: Without dead ends: 682 [2022-11-26 00:45:02,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5213 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=8963, Invalid=15843, Unknown=0, NotChecked=0, Total=24806 [2022-11-26 00:45:02,697 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 2303 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:02,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 439 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:45:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-26 00:45:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 284. [2022-11-26 00:45:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 281 states have (on average 1.2419928825622777) internal successors, (349), 281 states have internal predecessors, (349), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:45:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 351 transitions. [2022-11-26 00:45:02,769 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 351 transitions. Word has length 150 [2022-11-26 00:45:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:02,769 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 351 transitions. [2022-11-26 00:45:02,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 351 transitions. [2022-11-26 00:45:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-26 00:45:02,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:02,772 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:02,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:02,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:45:02,979 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1656544985, now seen corresponding path program 9 times [2022-11-26 00:45:02,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:02,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186736671] [2022-11-26 00:45:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5918 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-11-26 00:45:10,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186736671] [2022-11-26 00:45:10,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186736671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:45:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509979046] [2022-11-26 00:45:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:45:10,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:45:10,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:45:10,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:45:11,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:45:11,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:45:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-26 00:45:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5918 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-11-26 00:45:11,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5918 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-11-26 00:45:23,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509979046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:45:23,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306553784] [2022-11-26 00:45:23,905 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:45:23,906 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:45:23,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:45:23,906 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:45:23,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:45:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:23,929 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:45:23,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:45:23,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:23,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:45:23,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:23,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:45:23,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:23,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:24,003 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:45:24,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:45:24,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:45:24,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:45:24,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:45:24,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:45:24,095 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 128 treesize of output 118 [2022-11-26 00:45:24,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:45:24,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:24,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:24,267 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:45:24,267 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 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:45:24,716 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:45:24,716 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 28 treesize of output 27 [2022-11-26 00:45:24,874 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:45:24,874 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:45:25,717 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:45:25,718 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:45:25,943 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:45:25,953 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:45:27,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11768#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) 0))) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:45:27,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:45:27,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:45:27,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-26 00:45:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737744066] [2022-11-26 00:45:27,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:45:27,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-26 00:45:27,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-26 00:45:27,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22353, Invalid=24087, Unknown=0, NotChecked=0, Total=46440 [2022-11-26 00:45:27,149 INFO L87 Difference]: Start difference. First operand 284 states and 351 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:45,557 INFO L93 Difference]: Finished difference Result 1368 states and 2002 transitions. [2022-11-26 00:45:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-26 00:45:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-26 00:45:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:45,564 INFO L225 Difference]: With dead ends: 1368 [2022-11-26 00:45:45,564 INFO L226 Difference]: Without dead ends: 1185 [2022-11-26 00:45:45,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5242 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=22353, Invalid=24087, Unknown=0, NotChecked=0, Total=46440 [2022-11-26 00:45:45,569 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 2304 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 1731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2504 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1731 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:45,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2504 Valid, 266 Invalid, 3848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1731 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:45:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-11-26 00:45:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 385. [2022-11-26 00:45:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 382 states have (on average 1.1780104712041886) internal successors, (450), 382 states have internal predecessors, (450), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:45:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 452 transitions. [2022-11-26 00:45:45,680 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 452 transitions. Word has length 199 [2022-11-26 00:45:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:45,680 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 452 transitions. [2022-11-26 00:45:45,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 452 transitions. [2022-11-26 00:45:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-11-26 00:45:45,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:45,686 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:45,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-26 00:45:45,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:45:45,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash 252159341, now seen corresponding path program 10 times [2022-11-26 00:45:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:45:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383227213] [2022-11-26 00:45:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:45:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 21068 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-11-26 00:46:13,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:13,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383227213] [2022-11-26 00:46:13,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383227213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:13,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957068075] [2022-11-26 00:46:13,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:46:13,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:13,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:46:13,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:46:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2784 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-26 00:46:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:46:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21068 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-11-26 00:46:14,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21068 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-11-26 00:47:05,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957068075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:05,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534020913] [2022-11-26 00:47:05,798 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:47:05,798 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:05,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:05,799 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:05,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:05,826 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:47:05,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:47:05,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:05,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:47:05,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:05,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:47:05,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:05,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:05,910 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:47:05,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-26 00:47:05,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:47:05,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:47:05,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:47:05,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:47:06,021 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 128 treesize of output 118 [2022-11-26 00:47:06,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:47:06,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:06,187 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:47:06,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:47:06,593 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:47:06,593 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 28 treesize of output 27 [2022-11-26 00:47:06,758 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:47:06,759 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:47:07,308 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:47:07,309 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 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:47:07,582 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:47:07,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:09,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17203#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) 0))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:47:09,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:09,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:47:09,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-26 00:47:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517966650] [2022-11-26 00:47:09,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:09,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-26 00:47:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-26 00:47:09,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85478, Invalid=88828, Unknown=0, NotChecked=0, Total=174306 [2022-11-26 00:47:09,137 INFO L87 Difference]: Start difference. First operand 385 states and 452 transitions. Second operand has 405 states, 405 states have (on average 1.037037037037037) internal successors, (420), 404 states have internal predecessors, (420), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:09,045 INFO L93 Difference]: Finished difference Result 2378 states and 3517 transitions. [2022-11-26 00:52:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-26 00:52:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.037037037037037) internal successors, (420), 404 states have internal predecessors, (420), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2022-11-26 00:52:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:09,058 INFO L225 Difference]: With dead ends: 2378 [2022-11-26 00:52:09,058 INFO L226 Difference]: Without dead ends: 2195 [2022-11-26 00:52:09,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10494 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=85478, Invalid=88828, Unknown=0, NotChecked=0, Total=174306 [2022-11-26 00:52:09,071 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 5175 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 4596 mSolverCounterSat, 4100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5577 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 8696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4100 IncrementalHoareTripleChecker+Valid, 4596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:09,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5577 Valid, 461 Invalid, 8696 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4100 Valid, 4596 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-26 00:52:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2022-11-26 00:52:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 587. [2022-11-26 00:52:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 584 states have (on average 1.1164383561643836) internal successors, (652), 584 states have internal predecessors, (652), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:52:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 654 transitions. [2022-11-26 00:52:09,292 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 654 transitions. Word has length 300 [2022-11-26 00:52:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:09,293 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 654 transitions. [2022-11-26 00:52:09,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.037037037037037) internal successors, (420), 404 states have internal predecessors, (420), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:52:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 654 transitions. [2022-11-26 00:52:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-26 00:52:09,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:09,305 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:52:09,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:52:09,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:52:09,517 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:52:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2000714157, now seen corresponding path program 11 times [2022-11-26 00:52:09,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:09,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721855100] [2022-11-26 00:52:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:09,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81971 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2022-11-26 00:54:00,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721855100] [2022-11-26 00:54:00,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721855100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619668076] [2022-11-26 00:54:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:54:00,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:00,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:01,002 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:01,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e006c4-1bd5-486f-baf3-f035782db909/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:54:02,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:54:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:54:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:54:02,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 81971 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 81866 trivial. 0 not checked. [2022-11-26 00:54:04,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81971 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 81866 trivial. 0 not checked. [2022-11-26 00:54:07,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619668076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:07,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370866305] [2022-11-26 00:54:07,071 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:54:07,072 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:54:07,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:54:07,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:54:07,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:54:07,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:07,097 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:54:07,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:54:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:07,121 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:54:07,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:54:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:07,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:54:07,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:54:07,193 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:54:07,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-26 00:54:07,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:54:07,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 00:54:07,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:54:07,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:54:07,305 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:54:07,305 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 118 treesize of output 119 [2022-11-26 00:54:07,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:54:07,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:54:07,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:54:07,498 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:54:07,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 149 [2022-11-26 00:54:07,853 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:54:07,854 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 28 treesize of output 27 [2022-11-26 00:54:08,024 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:54:08,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:54:08,518 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-26 00:54:08,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-26 00:54:08,737 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-26 00:54:08,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:11,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26080#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) 4))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:54:11,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:54:11,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:11,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 5, 5] total 412 [2022-11-26 00:54:11,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17159452] [2022-11-26 00:54:11,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:11,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 413 states [2022-11-26 00:54:11,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 413 interpolants. [2022-11-26 00:54:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85537, Invalid=95513, Unknown=0, NotChecked=0, Total=181050 [2022-11-26 00:54:11,048 INFO L87 Difference]: Start difference. First operand 587 states and 654 transitions. Second operand has 413 states, 413 states have (on average 1.0653753026634383) internal successors, (440), 412 states have internal predecessors, (440), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)