./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0 --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 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- 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-e04fb08 [2022-11-16 15:54:39,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 15:54:39,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 15:54:39,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 15:54:39,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 15:54:39,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 15:54:39,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 15:54:39,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 15:54:39,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 15:54:39,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 15:54:39,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 15:54:39,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 15:54:39,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 15:54:39,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 15:54:39,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 15:54:39,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 15:54:39,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 15:54:39,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 15:54:39,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 15:54:39,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 15:54:39,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 15:54:39,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 15:54:39,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 15:54:39,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 15:54:39,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 15:54:39,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 15:54:39,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 15:54:39,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 15:54:39,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 15:54:39,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 15:54:39,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 15:54:39,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 15:54:39,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 15:54:39,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 15:54:39,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 15:54:39,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 15:54:39,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 15:54:39,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 15:54:39,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 15:54:39,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 15:54:39,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 15:54:39,392 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 15:54:39,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 15:54:39,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 15:54:39,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 15:54:39,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 15:54:39,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 15:54:39,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 15:54:39,436 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 15:54:39,436 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 15:54:39,437 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 15:54:39,437 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 15:54:39,438 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 15:54:39,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 15:54:39,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 15:54:39,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 15:54:39,439 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 15:54:39,439 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 15:54:39,439 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 15:54:39,439 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 15:54:39,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 15:54:39,440 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 15:54:39,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 15:54:39,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 15:54:39,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 15:54:39,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 15:54:39,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 15:54:39,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 15:54:39,443 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 15:54:39,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 15:54:39,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 15:54:39,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 15:54:39,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 15:54:39,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 15:54:39,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:54:39,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 15:54:39,445 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 15:54:39,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 15:54:39,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 15:54:39,447 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 15:54:39,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 15:54:39,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 15:54:39,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 15:54:39,447 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_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2022-11-16 15:54:39,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 15:54:39,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 15:54:39,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 15:54:39,782 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 15:54:39,782 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 15:54:39,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2022-11-16 15:54:39,856 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/data/0d7bd248c/c9249d4c8f234b77b26124672a1da022/FLAG58082af12 [2022-11-16 15:54:40,472 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 15:54:40,473 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2022-11-16 15:54:40,487 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/data/0d7bd248c/c9249d4c8f234b77b26124672a1da022/FLAG58082af12 [2022-11-16 15:54:40,730 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/data/0d7bd248c/c9249d4c8f234b77b26124672a1da022 [2022-11-16 15:54:40,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 15:54:40,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 15:54:40,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 15:54:40,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 15:54:40,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 15:54:40,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:54:40" (1/1) ... [2022-11-16 15:54:40,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a6a843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:40, skipping insertion in model container [2022-11-16 15:54:40,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:54:40" (1/1) ... [2022-11-16 15:54:40,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 15:54:40,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 15:54:41,205 WARN L229 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_771539b6-f6b5-466b-8b95-be29f45a2ca0/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2022-11-16 15:54:41,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:54:41,225 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 15:54:41,280 WARN L229 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_771539b6-f6b5-466b-8b95-be29f45a2ca0/sv-benchmarks/c/list-simple/sll2n_append_unequal.i[24323,24336] [2022-11-16 15:54:41,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:54:41,306 INFO L208 MainTranslator]: Completed translation [2022-11-16 15:54:41,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41 WrapperNode [2022-11-16 15:54:41,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 15:54:41,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 15:54:41,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 15:54:41,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 15:54:41,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,380 INFO L138 Inliner]: procedures = 127, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2022-11-16 15:54:41,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 15:54:41,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 15:54:41,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 15:54:41,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 15:54:41,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 15:54:41,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 15:54:41,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 15:54:41,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 15:54:41,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (1/1) ... [2022-11-16 15:54:41,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:54:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:41,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 15:54:41,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 15:54:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 15:54:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 15:54:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-16 15:54:41,554 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-16 15:54:41,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 15:54:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 15:54:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 15:54:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 15:54:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 15:54:41,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 15:54:41,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 15:54:41,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 15:54:41,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 15:54:41,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 15:54:41,709 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 15:54:41,722 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 15:54:41,974 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 15:54:42,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 15:54:42,042 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 15:54:42,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:54:42 BoogieIcfgContainer [2022-11-16 15:54:42,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 15:54:42,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 15:54:42,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 15:54:42,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 15:54:42,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 03:54:40" (1/3) ... [2022-11-16 15:54:42,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d728fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:54:42, skipping insertion in model container [2022-11-16 15:54:42,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:54:41" (2/3) ... [2022-11-16 15:54:42,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d728fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:54:42, skipping insertion in model container [2022-11-16 15:54:42,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:54:42" (3/3) ... [2022-11-16 15:54:42,055 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2022-11-16 15:54:42,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 15:54:42,078 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 15:54:42,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:54:42,146 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;@215a9fb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:54:42,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 15:54:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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) [2022-11-16 15:54:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 15:54:42,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:42,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:42,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:54:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1677122263, now seen corresponding path program 1 times [2022-11-16 15:54:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:42,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024484975] [2022-11-16 15:54:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:54:42,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024484975] [2022-11-16 15:54:42,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024484975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:54:42,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:54:42,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 15:54:42,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708803586] [2022-11-16 15:54:42,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:54:42,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:54:42,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:54:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:54:42,664 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-11-16 15:54:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:42,737 INFO L93 Difference]: Finished difference Result 53 states and 77 transitions. [2022-11-16 15:54:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:54:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-16 15:54:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:42,752 INFO L225 Difference]: With dead ends: 53 [2022-11-16 15:54:42,752 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 15:54:42,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:54:42,760 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:42,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:54:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 15:54:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-16 15:54:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 20 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) [2022-11-16 15:54:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-11-16 15:54:42,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2022-11-16 15:54:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:42,808 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-11-16 15:54:42,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-11-16 15:54:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-11-16 15:54:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 15:54:42,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:42,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:42,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 15:54:42,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:54:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1036648687, now seen corresponding path program 1 times [2022-11-16 15:54:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515247983] [2022-11-16 15:54:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:42,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 15:54:43,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:43,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515247983] [2022-11-16 15:54:43,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515247983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:43,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349510646] [2022-11-16 15:54:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:43,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:43,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:43,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:43,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 15:54:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 15:54:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:54:43,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 15:54:43,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349510646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:54:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940414394] [2022-11-16 15:54:43,330 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 15:54:43,331 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:43,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:43,344 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:43,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:43,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,502 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:54:43,503 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 [2022-11-16 15:54:43,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,526 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 [2022-11-16 15:54:43,597 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 [2022-11-16 15:54:43,604 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 [2022-11-16 15:54:43,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 15:54:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:54:43,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:54:43,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:54:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:54:43,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:54:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:54:43,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:43,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-16 15:54:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:43,949 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 21 treesize of output 13 [2022-11-16 15:54:43,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:43,965 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 21 treesize of output 13 [2022-11-16 15:54:44,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:44,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:44,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:54:44,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:44,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:44,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:44,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:44,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:44,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:44,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:54:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:44,463 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 222 treesize of output 202 [2022-11-16 15:54:44,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:44,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 204 [2022-11-16 15:54:44,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:44,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 208 [2022-11-16 15:54:44,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:54:44,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:44,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:44,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:44,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:44,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:44,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:44,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:44,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:44,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:54:44,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:44,946 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 222 treesize of output 202 [2022-11-16 15:54:44,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:44,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 204 [2022-11-16 15:54:44,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:44,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 208 [2022-11-16 15:54:45,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:45,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:45,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:45,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:45,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 15:54:45,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 15:54:45,584 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 15 treesize of output 1 [2022-11-16 15:54:45,826 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-16 15:54:45,834 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 [2022-11-16 15:54:45,839 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 [2022-11-16 15:54:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:45,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:54:45,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:45,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 15:54:45,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:45,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:54:45,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:48,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '245#(and (<= 5 |ULTIMATE.start_sll_append_~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|) |ULTIMATE.start_sll_append_~new_last~0#1.offset|) (<= |ULTIMATE.start_sll_append_#in~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_append_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 5 |ULTIMATE.start_sll_append_#in~data#1|) (<= |ULTIMATE.start_sll_append_~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.base|) (<= |ULTIMATE.start_sll_append_#in~head#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|) |ULTIMATE.start_sll_append_~new_last~0#1.base|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:48,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:48,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:54:48,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-16 15:54:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085612972] [2022-11-16 15:54:48,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:48,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 15:54:48,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 15:54:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-16 15:54:48,161 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 15:54:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:48,194 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-11-16 15:54:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 15:54:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2022-11-16 15:54:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:48,196 INFO L225 Difference]: With dead ends: 46 [2022-11-16 15:54:48,196 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 15:54:48,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-16 15:54:48,198 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:48,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:54:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 15:54:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-16 15:54:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 15:54:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2022-11-16 15:54:48,204 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 18 [2022-11-16 15:54:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:48,205 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2022-11-16 15:54:48,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 15:54:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2022-11-16 15:54:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 15:54:48,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:48,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:48,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 15:54:48,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:48,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:54:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1850503221, now seen corresponding path program 2 times [2022-11-16 15:54:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:48,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201709330] [2022-11-16 15:54:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:48,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 15:54:49,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:49,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201709330] [2022-11-16 15:54:49,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201709330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:49,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761206460] [2022-11-16 15:54:49,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:54:49,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:49,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:49,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:49,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 15:54:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 15:54:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:54:49,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 15:54:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:49,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-16 15:54:49,404 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (exists ((v_ArrVal_209 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_209) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-16 15:54:49,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,431 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 15 treesize of output 17 [2022-11-16 15:54:49,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-16 15:54:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-11-16 15:54:49,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:49,566 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_17| Int) (v_ArrVal_212 (Array Int Int))) (or (not (< |v_node_create_~temp~0#1.base_17| |c_#StackHeapBarrier|)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_17| v_ArrVal_212) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))) is different from false [2022-11-16 15:54:49,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761206460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:49,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281489063] [2022-11-16 15:54:49,574 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 15:54:49,575 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:49,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:49,583 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:49,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:49,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,625 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:54:49,625 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 [2022-11-16 15:54:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,638 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 [2022-11-16 15:54:49,674 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 [2022-11-16 15:54:49,681 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 [2022-11-16 15:54:49,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:54:49,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:54:49,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 15:54:49,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:54:49,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:54:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:54:49,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:54:49,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 15:54:49,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:49,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-16 15:54:49,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 15:54:49,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:49,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:49,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:49,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:54:49,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:50,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:50,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:50,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:50,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:50,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:54:50,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 15:54:50,166 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 13 treesize of output 9 [2022-11-16 15:54:50,183 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 19 treesize of output 1 [2022-11-16 15:54:50,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-16 15:54:50,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 52 [2022-11-16 15:54:50,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2022-11-16 15:54:50,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-16 15:54:50,499 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 19 treesize of output 1 [2022-11-16 15:54:50,510 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 13 treesize of output 9 [2022-11-16 15:54:50,519 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 13 treesize of output 9 [2022-11-16 15:54:50,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:50,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:50,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:50,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:50,874 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 15 treesize of output 1 [2022-11-16 15:54:50,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 15:54:50,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 15:54:51,015 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2022-11-16 15:54:51,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:54,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '467#(and (<= 5 |ULTIMATE.start_sll_append_~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|) |ULTIMATE.start_sll_append_~new_last~0#1.offset|) (<= |ULTIMATE.start_sll_append_#in~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_append_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~count~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 5 |ULTIMATE.start_sll_append_#in~data#1|) (<= |ULTIMATE.start_sll_append_~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.base|) (<= |ULTIMATE.start_sll_append_#in~head#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|) |ULTIMATE.start_sll_append_~new_last~0#1.base|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:54,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:54,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:54:54,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-11-16 15:54:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983139728] [2022-11-16 15:54:54,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:54,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 15:54:54,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 15:54:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=894, Unknown=2, NotChecked=122, Total=1122 [2022-11-16 15:54:54,347 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 15:54:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:54,637 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-11-16 15:54:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 15:54:54,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2022-11-16 15:54:54,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:54,643 INFO L225 Difference]: With dead ends: 37 [2022-11-16 15:54:54,643 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 15:54:54,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=142, Invalid=1196, Unknown=2, NotChecked=142, Total=1482 [2022-11-16 15:54:54,645 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:54,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 206 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-16 15:54:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 15:54:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-16 15:54:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 15:54:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-16 15:54:54,651 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 24 [2022-11-16 15:54:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:54,651 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-16 15:54:54,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 15:54:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-16 15:54:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 15:54:54,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:54,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:54,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 15:54:54,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:54,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:54:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash -638759605, now seen corresponding path program 1 times [2022-11-16 15:54:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:54,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082673735] [2022-11-16 15:54:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:54:56,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:56,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082673735] [2022-11-16 15:54:56,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082673735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:56,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743000483] [2022-11-16 15:54:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:56,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:56,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:56,153 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:56,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 15:54:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:56,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 15:54:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:56,348 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 [2022-11-16 15:54:56,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 15:54:56,641 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-16 15:54:56,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 20 [2022-11-16 15:54:56,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:56,781 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-16 15:54:56,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 53 [2022-11-16 15:54:56,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:56,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2022-11-16 15:54:56,806 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 15:54:56,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 15:54:57,194 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-16 15:54:57,195 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 32 treesize of output 31 [2022-11-16 15:54:57,242 INFO L321 Elim1Store]: treesize reduction 101, result has 25.2 percent of original size [2022-11-16 15:54:57,243 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 66 [2022-11-16 15:54:57,498 INFO L321 Elim1Store]: treesize reduction 18, result has 80.2 percent of original size [2022-11-16 15:54:57,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 133 [2022-11-16 15:54:57,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2022-11-16 15:54:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:54:57,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:58,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743000483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:58,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740894135] [2022-11-16 15:54:58,217 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 15:54:58,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:58,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:58,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:58,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,270 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 15:54:58,270 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 [2022-11-16 15:54:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,296 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:54:58,297 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 [2022-11-16 15:54:58,329 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 [2022-11-16 15:54:58,334 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 [2022-11-16 15:54:58,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:54:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 15:54:58,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:54:58,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:54:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:54:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:54:58,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:54:58,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:58,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 187 [2022-11-16 15:54:58,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:58,530 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 187 [2022-11-16 15:54:58,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:58,545 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 98 [2022-11-16 15:54:58,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:58,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:58,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:54:58,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:58,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:58,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:58,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:54:58,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:58,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:54:58,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:54:58,761 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 19 treesize of output 1 [2022-11-16 15:54:58,771 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 13 treesize of output 9 [2022-11-16 15:54:58,779 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 13 treesize of output 9 [2022-11-16 15:54:58,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-16 15:54:58,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 52 [2022-11-16 15:54:58,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-16 15:54:58,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 52 [2022-11-16 15:54:59,036 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 19 treesize of output 1 [2022-11-16 15:54:59,044 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 13 treesize of output 9 [2022-11-16 15:54:59,052 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 13 treesize of output 9 [2022-11-16 15:54:59,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:59,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:59,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:59,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:54:59,427 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 19 treesize of output 1 [2022-11-16 15:54:59,460 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-16 15:54:59,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-11-16 15:54:59,487 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-16 15:54:59,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 36 [2022-11-16 15:54:59,604 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2022-11-16 15:54:59,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:55:04,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '721#(and (<= 5 |ULTIMATE.start_sll_append_~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|) |ULTIMATE.start_sll_append_~last~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|) |ULTIMATE.start_sll_append_~last~0#1.base|) (<= |ULTIMATE.start_sll_append_#in~data#1| 5) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|) 0))) (<= 0 |ULTIMATE.start_sll_append_~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_append_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~last~0#1.base|) (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4)) |ULTIMATE.start_sll_append_~new_last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 5 |ULTIMATE.start_sll_append_#in~data#1|) (<= |ULTIMATE.start_sll_append_~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.base|) (= |ULTIMATE.start_sll_append_~new_last~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~last~0#1.base|) (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (<= |ULTIMATE.start_sll_append_#in~head#1.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0) (= |#NULL.base| 0))' at error location [2022-11-16 15:55:04,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:55:04,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:55:04,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 32 [2022-11-16 15:55:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131563989] [2022-11-16 15:55:04,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:55:04,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 15:55:04,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 15:55:04,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2568, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 15:55:04,789 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 32 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 15:55:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:05,890 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-11-16 15:55:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 15:55:05,891 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 27 [2022-11-16 15:55:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:05,893 INFO L225 Difference]: With dead ends: 41 [2022-11-16 15:55:05,893 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 15:55:05,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=309, Invalid=3981, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 15:55:05,896 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:05,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 285 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2022-11-16 15:55:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 15:55:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-16 15:55:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 15:55:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-11-16 15:55:05,903 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 27 [2022-11-16 15:55:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:05,904 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-11-16 15:55:05,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 15:55:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-11-16 15:55:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 15:55:05,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:05,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:05,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 15:55:06,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:06,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:55:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 756146850, now seen corresponding path program 1 times [2022-11-16 15:55:06,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744804367] [2022-11-16 15:55:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:06,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:55:08,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:08,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744804367] [2022-11-16 15:55:08,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744804367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:08,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291186293] [2022-11-16 15:55:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:08,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:08,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:08,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:08,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 15:55:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:09,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-16 15:55:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:55:09,434 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 [2022-11-16 15:55:09,497 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 [2022-11-16 15:55:09,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:09,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 15:55:09,693 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 13 treesize of output 9 [2022-11-16 15:55:09,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-11-16 15:55:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:09,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 15:55:09,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:09,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:55:10,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:10,085 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 55 treesize of output 49 [2022-11-16 15:55:10,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:10,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 15:55:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:10,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:10,129 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 25 treesize of output 30 [2022-11-16 15:55:10,146 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 15:55:10,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 15:55:10,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:10,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 15:55:10,908 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-16 15:55:10,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 56 [2022-11-16 15:55:10,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:10,951 INFO L321 Elim1Store]: treesize reduction 168, result has 11.6 percent of original size [2022-11-16 15:55:10,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 58 treesize of output 48 [2022-11-16 15:55:11,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-11-16 15:55:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:11,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2022-11-16 15:55:11,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-16 15:55:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:55:11,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:55:22,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291186293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:22,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017293425] [2022-11-16 15:55:22,046 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 15:55:22,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:55:22,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:55:22,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:55:22,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:55:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,089 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:55:22,089 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 [2022-11-16 15:55:22,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,101 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 [2022-11-16 15:55:22,130 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 [2022-11-16 15:55:22,134 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 [2022-11-16 15:55:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 15:55:22,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:55:22,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:55:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:55:22,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:55:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:55:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:55:22,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:22,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 187 [2022-11-16 15:55:22,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:22,323 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 187 [2022-11-16 15:55:22,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:22,339 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 98 [2022-11-16 15:55:22,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:55:22,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:22,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:22,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:55:22,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:55:22,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:55:22,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:22,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:55:22,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:22,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:55:22,557 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 19 treesize of output 1 [2022-11-16 15:55:22,569 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 13 treesize of output 9 [2022-11-16 15:55:22,578 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 13 treesize of output 9 [2022-11-16 15:55:22,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2022-11-16 15:55:22,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-16 15:55:22,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2022-11-16 15:55:22,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-16 15:55:22,843 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 19 treesize of output 1 [2022-11-16 15:55:22,852 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 13 treesize of output 9 [2022-11-16 15:55:22,862 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 13 treesize of output 9 [2022-11-16 15:55:22,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:22,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:23,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:23,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:23,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 15:55:23,317 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 19 treesize of output 1 [2022-11-16 15:55:23,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 15:55:23,439 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2022-11-16 15:55:23,551 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:55:29,062 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1039#(and (<= 5 |ULTIMATE.start_sll_append_~data#1|) (<= |ULTIMATE.start_sll_append_#in~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_append_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.offset|) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~last~0#1.base|) (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4)) |ULTIMATE.start_sll_append_~new_last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 5 |ULTIMATE.start_sll_append_#in~data#1|) (<= |ULTIMATE.start_sll_append_~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.base|) (= |ULTIMATE.start_sll_append_~new_last~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~last~0#1.base|) (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (<= |ULTIMATE.start_sll_append_#in~head#1.offset| 0) (not (= |ULTIMATE.start_main_~data~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0))) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 15:55:29,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:55:29,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:55:29,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 43 [2022-11-16 15:55:29,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220454774] [2022-11-16 15:55:29,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:55:29,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 15:55:29,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 15:55:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4282, Unknown=4, NotChecked=0, Total=4556 [2022-11-16 15:55:29,066 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 43 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 15:55:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:30,560 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-11-16 15:55:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 15:55:30,562 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 31 [2022-11-16 15:55:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:30,563 INFO L225 Difference]: With dead ends: 52 [2022-11-16 15:55:30,563 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 15:55:30,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=454, Invalid=6022, Unknown=4, NotChecked=0, Total=6480 [2022-11-16 15:55:30,566 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:30,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 221 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 469 Invalid, 0 Unknown, 3 Unchecked, 0.5s Time] [2022-11-16 15:55:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 15:55:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2022-11-16 15:55:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 15:55:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-16 15:55:30,576 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 31 [2022-11-16 15:55:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:30,576 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-16 15:55:30,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 15:55:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-16 15:55:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 15:55:30,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:30,578 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:30,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 15:55:30,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:30,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:55:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1965661372, now seen corresponding path program 1 times [2022-11-16 15:55:30,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:30,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724882233] [2022-11-16 15:55:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:30,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 15:55:30,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:30,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724882233] [2022-11-16 15:55:30,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724882233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:55:30,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:55:30,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 15:55:30,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791557547] [2022-11-16 15:55:30,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:55:30,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 15:55:30,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 15:55:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 15:55:30,906 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 15:55:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:30,991 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-11-16 15:55:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 15:55:30,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-16 15:55:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:30,995 INFO L225 Difference]: With dead ends: 47 [2022-11-16 15:55:30,995 INFO L226 Difference]: Without dead ends: 42 [2022-11-16 15:55:30,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 15:55:30,997 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:30,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:55:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-16 15:55:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-16 15:55:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 15:55:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-16 15:55:31,017 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 32 [2022-11-16 15:55:31,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:31,017 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-16 15:55:31,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 15:55:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-16 15:55:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 15:55:31,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:31,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 15:55:31,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:55:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1936828483, now seen corresponding path program 2 times [2022-11-16 15:55:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:31,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207646088] [2022-11-16 15:55:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:31,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:55:34,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207646088] [2022-11-16 15:55:34,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207646088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:34,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892579524] [2022-11-16 15:55:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:55:34,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:34,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:34,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:34,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 15:55:34,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 15:55:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:55:34,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-16 15:55:34,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:55:34,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 15:55:34,801 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 13 treesize of output 9 [2022-11-16 15:55:34,819 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 13 treesize of output 9 [2022-11-16 15:55:35,203 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 15:55:35,204 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 16 treesize of output 22 [2022-11-16 15:55:35,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:35,234 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:55:35,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 15:55:35,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 15:55:35,357 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 21 treesize of output 20 [2022-11-16 15:55:35,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-16 15:55:35,608 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:55:35,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 38 [2022-11-16 15:55:35,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:55:35,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 15:55:35,712 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_661 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_661))) (exists ((v_ArrVal_660 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_660))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-16 15:55:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:35,753 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-16 15:55:35,754 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 76 [2022-11-16 15:55:35,776 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-16 15:55:35,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 15:55:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:35,790 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-16 15:55:35,791 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 2 case distinctions, treesize of input 40 treesize of output 48 [2022-11-16 15:55:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-16 15:55:36,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:55:36,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892579524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:36,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113064831] [2022-11-16 15:55:36,987 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 15:55:36,987 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:55:36,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:55:36,988 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:55:36,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:55:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,023 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:55:37,023 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 [2022-11-16 15:55:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,033 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 [2022-11-16 15:55:37,060 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 [2022-11-16 15:55:37,064 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 [2022-11-16 15:55:37,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-16 15:55:37,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:55:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-16 15:55:37,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:55:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:55:37,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 15:55:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-16 15:55:37,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:37,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:37,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 187 [2022-11-16 15:55:37,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:37,226 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 187 [2022-11-16 15:55:37,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:55:37,239 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 98 [2022-11-16 15:55:37,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:55:37,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:37,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:37,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:55:37,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:55:37,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:55:37,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-16 15:55:37,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:37,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:55:37,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:37,483 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 19 treesize of output 1 [2022-11-16 15:55:37,494 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 13 treesize of output 9 [2022-11-16 15:55:37,502 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 13 treesize of output 9 [2022-11-16 15:55:37,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2022-11-16 15:55:37,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-16 15:55:37,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-11-16 15:55:37,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 52 [2022-11-16 15:55:37,730 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 19 treesize of output 1 [2022-11-16 15:55:37,740 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 13 treesize of output 9 [2022-11-16 15:55:37,749 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 13 treesize of output 9 [2022-11-16 15:55:37,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:37,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:37,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:37,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:38,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-16 15:55:38,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 15:55:38,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 15:55:38,279 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 49 for LOIs [2022-11-16 15:55:38,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:55:44,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1516#(and (<= 5 |ULTIMATE.start_sll_append_~data#1|) (<= |ULTIMATE.start_sll_append_#in~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= 0 |ULTIMATE.start_sll_append_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.offset|) (= |ULTIMATE.start_main_~temp~2#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~count~0#1| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_append_~last~0#1.base|) (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4)) |ULTIMATE.start_sll_append_~new_last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 5 |ULTIMATE.start_sll_append_#in~data#1|) (<= |ULTIMATE.start_sll_append_~data#1| 5) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.base|) (= |ULTIMATE.start_sll_append_~new_last~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_append_~last~0#1.base|) (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (<= |ULTIMATE.start_sll_append_#in~head#1.offset| 0) (not (= |ULTIMATE.start_main_~data~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) |ULTIMATE.start_main_~ptr~0#1.offset|))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) 0))) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_append_~new_last~0#1.offset| 0) (<= |ULTIMATE.start_sll_append_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4)) |ULTIMATE.start_main_~temp~2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 15:55:44,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:55:44,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:55:44,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19] total 42 [2022-11-16 15:55:44,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548196332] [2022-11-16 15:55:44,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:55:44,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 15:55:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:55:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 15:55:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3832, Unknown=2, NotChecked=124, Total=4160 [2022-11-16 15:55:44,180 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 42 states, 35 states have (on average 1.457142857142857) internal successors, (51), 33 states have internal predecessors, (51), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 15:55:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:55:46,735 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-11-16 15:55:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 15:55:46,735 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 1.457142857142857) internal successors, (51), 33 states have internal predecessors, (51), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-11-16 15:55:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:55:46,736 INFO L225 Difference]: With dead ends: 79 [2022-11-16 15:55:46,736 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 15:55:46,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=319, Invalid=6003, Unknown=2, NotChecked=156, Total=6480 [2022-11-16 15:55:46,739 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 15:55:46,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 272 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 467 Invalid, 0 Unknown, 133 Unchecked, 0.6s Time] [2022-11-16 15:55:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 15:55:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2022-11-16 15:55:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 15:55:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-11-16 15:55:46,751 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2022-11-16 15:55:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:55:46,752 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-11-16 15:55:46,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 1.457142857142857) internal successors, (51), 33 states have internal predecessors, (51), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 15:55:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-11-16 15:55:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 15:55:46,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:55:46,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:55:46,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 15:55:46,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:46,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:55:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:55:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash -732007612, now seen corresponding path program 1 times [2022-11-16 15:55:46,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:55:46,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866838384] [2022-11-16 15:55:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:46,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:55:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:55:49,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:55:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866838384] [2022-11-16 15:55:49,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866838384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:55:49,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915919913] [2022-11-16 15:55:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:55:49,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:55:49,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:55:49,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:55:49,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_771539b6-f6b5-466b-8b95-be29f45a2ca0/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 15:55:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:55:50,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 166 conjunts are in the unsatisfiable core [2022-11-16 15:55:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:55:50,207 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 [2022-11-16 15:55:50,284 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 [2022-11-16 15:55:50,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:50,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 15:55:50,486 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 13 treesize of output 9 [2022-11-16 15:55:50,495 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 13 treesize of output 9 [2022-11-16 15:55:50,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-16 15:55:50,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:55:50,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:55:50,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-16 15:55:50,913 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 15:55:50,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 15:55:50,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:50,950 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 15:55:50,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 15:55:50,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 15:55:50,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 15:55:51,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 15:55:51,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 15:55:51,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-16 15:55:51,543 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2022-11-16 15:55:51,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 65 [2022-11-16 15:55:51,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:51,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:51,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 12 [2022-11-16 15:55:51,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 15:55:51,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:55:51,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:51,901 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-16 15:55:51,902 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 159 [2022-11-16 15:55:51,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:51,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:51,937 INFO L321 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2022-11-16 15:55:51,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 162 [2022-11-16 15:55:51,979 INFO L321 Elim1Store]: treesize reduction 39, result has 48.7 percent of original size [2022-11-16 15:55:51,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 48 [2022-11-16 15:55:51,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 15:55:52,028 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2022-11-16 15:55:52,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-16 15:55:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:55:53,563 INFO L321 Elim1Store]: treesize reduction 168, result has 24.0 percent of original size [2022-11-16 15:55:53,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 230 treesize of output 219 [2022-11-16 15:55:53,693 INFO L321 Elim1Store]: treesize reduction 170, result has 17.5 percent of original size [2022-11-16 15:55:53,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 223 treesize of output 120 [2022-11-16 15:55:53,750 INFO L321 Elim1Store]: treesize reduction 45, result has 48.9 percent of original size [2022-11-16 15:55:53,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 54 [2022-11-16 15:56:14,519 INFO L321 Elim1Store]: treesize reduction 130, result has 85.8 percent of original size [2022-11-16 15:56:14,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 786 treesize of output 1050 [2022-11-16 15:56:18,335 INFO L321 Elim1Store]: treesize reduction 36, result has 91.8 percent of original size [2022-11-16 15:56:18,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 726 treesize of output 951