./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:14:39,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:14:39,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:14:39,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:14:39,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:14:39,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:14:39,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:14:39,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:14:39,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:14:39,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:14:39,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:14:39,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:14:39,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:14:39,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:14:39,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:14:39,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:14:39,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:14:39,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:14:39,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:14:39,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:14:39,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:14:39,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:14:39,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:14:39,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:14:39,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:14:39,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:14:39,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:14:39,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:14:39,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:14:39,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:14:39,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:14:39,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:14:39,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:14:39,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:14:39,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:14:39,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:14:39,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:14:39,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:14:39,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:14:39,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:14:39,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:14:39,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:14:39,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:14:39,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:14:39,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:14:39,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:14:39,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:14:39,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:14:39,588 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:14:39,588 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:14:39,588 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:14:39,589 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:14:39,589 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:14:39,589 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:14:39,589 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:14:39,589 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:14:39,590 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:14:39,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:14:39,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:14:39,590 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:14:39,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:14:39,591 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:14:39,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:14:39,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:14:39,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:14:39,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:14:39,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:14:39,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:14:39,593 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:14:39,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:14:39,593 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:14:39,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:14:39,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:14:39,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:14:39,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:14:39,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:14:39,595 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:14:39,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:14:39,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:14:39,595 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:14:39,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:14:39,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:14:39,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:14:39,596 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_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2022-11-25 22:14:39,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:14:39,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:14:39,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:14:39,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:14:39,940 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:14:39,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-25 22:14:43,108 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:14:43,307 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:14:43,308 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-25 22:14:43,314 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/data/e7b677d8c/aad7ade242504f1e914f8aa2f1a5a0bf/FLAG251fdac6a [2022-11-25 22:14:43,329 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/data/e7b677d8c/aad7ade242504f1e914f8aa2f1a5a0bf [2022-11-25 22:14:43,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:14:43,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:14:43,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:14:43,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:14:43,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:14:43,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd03809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43, skipping insertion in model container [2022-11-25 22:14:43,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:14:43,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:14:43,514 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-25 22:14:43,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:14:43,544 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:14:43,555 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-25 22:14:43,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:14:43,581 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:14:43,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43 WrapperNode [2022-11-25 22:14:43,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:14:43,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:14:43,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:14:43,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:14:43,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,624 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-25 22:14:43,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:14:43,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:14:43,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:14:43,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:14:43,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:14:43,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:14:43,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:14:43,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:14:43,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (1/1) ... [2022-11-25 22:14:43,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:14:43,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:43,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:14:43,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:14:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:14:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:14:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:14:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:14:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:14:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:14:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:14:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:14:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:14:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:14:43,843 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:14:43,848 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:14:44,120 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:14:44,174 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:14:44,174 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 22:14:44,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:14:44 BoogieIcfgContainer [2022-11-25 22:14:44,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:14:44,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:14:44,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:14:44,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:14:44,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:14:43" (1/3) ... [2022-11-25 22:14:44,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16575a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:14:44, skipping insertion in model container [2022-11-25 22:14:44,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:43" (2/3) ... [2022-11-25 22:14:44,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16575a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:14:44, skipping insertion in model container [2022-11-25 22:14:44,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:14:44" (3/3) ... [2022-11-25 22:14:44,194 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2022-11-25 22:14:44,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:14:44,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:14:44,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:14:44,310 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;@1d537e83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:14:44,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:14:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-11-25 22:14:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:14:44,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:44,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:44,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash 857550697, now seen corresponding path program 1 times [2022-11-25 22:14:44,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:44,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853312035] [2022-11-25 22:14:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:44,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:44,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853312035] [2022-11-25 22:14:44,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853312035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:44,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:44,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:14:44,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373244484] [2022-11-25 22:14:44,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:44,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 22:14:44,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 22:14:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:14:44,559 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-25 22:14:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:44,641 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-25 22:14:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 22:14:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 11 [2022-11-25 22:14:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:44,657 INFO L225 Difference]: With dead ends: 24 [2022-11-25 22:14:44,657 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 22:14:44,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 22:14:44,663 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:44,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:14:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 22:14:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 22:14:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2022-11-25 22:14:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-25 22:14:44,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-11-25 22:14:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:44,746 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-25 22:14:44,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-25 22:14:44,746 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-25 22:14:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 22:14:44,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:44,750 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:44,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:14:44,751 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1659101310, now seen corresponding path program 1 times [2022-11-25 22:14:44,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073388575] [2022-11-25 22:14:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:14:45,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073388575] [2022-11-25 22:14:45,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073388575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:45,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:45,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:14:45,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244190778] [2022-11-25 22:14:45,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:45,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:14:45,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:45,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:14:45,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:14:45,158 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-25 22:14:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:45,218 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-25 22:14:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:14:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) Word has length 16 [2022-11-25 22:14:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:45,222 INFO L225 Difference]: With dead ends: 19 [2022-11-25 22:14:45,222 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 22:14:45,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:14:45,226 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:45,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:14:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 22:14:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 22:14:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-11-25 22:14:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-25 22:14:45,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2022-11-25 22:14:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:45,237 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-25 22:14:45,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-25 22:14:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-25 22:14:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:14:45,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:45,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:45,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:14:45,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:45,240 INFO L85 PathProgramCache]: Analyzing trace with hash 107201699, now seen corresponding path program 1 times [2022-11-25 22:14:45,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:45,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071046549] [2022-11-25 22:14:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:45,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:14:45,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:45,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071046549] [2022-11-25 22:14:45,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071046549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:45,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:45,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:14:45,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22910049] [2022-11-25 22:14:45,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:45,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:14:45,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:45,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:14:45,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:14:45,444 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-25 22:14:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:45,511 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-25 22:14:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:14:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) Word has length 17 [2022-11-25 22:14:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:45,513 INFO L225 Difference]: With dead ends: 29 [2022-11-25 22:14:45,513 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 22:14:45,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:14:45,523 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:45,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:14:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 22:14:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 22:14:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-11-25 22:14:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-25 22:14:45,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2022-11-25 22:14:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:45,541 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-25 22:14:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-25 22:14:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-25 22:14:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 22:14:45,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:45,544 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:45,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:14:45,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:45,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1924715561, now seen corresponding path program 1 times [2022-11-25 22:14:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079799922] [2022-11-25 22:14:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:45,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:45,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:14:45,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111038269] [2022-11-25 22:14:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:45,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:45,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:45,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:45,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:14:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:45,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:14:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:14:45,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:14:45,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079799922] [2022-11-25 22:14:45,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:14:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111038269] [2022-11-25 22:14:45,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111038269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807370859] [2022-11-25 22:14:46,009 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:14:46,010 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:46,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:46,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:46,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:46,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,272 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:14:46,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:14:46,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-25 22:14:46,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:46,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:14:46,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:46,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:46,594 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:14:46,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:14:46,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:46,751 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:14:46,751 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:14:46,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:46,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:46,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:46,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:46,897 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:14:46,898 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:14:47,069 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:14:47,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:48,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:48,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:48,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:14:48,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-25 22:14:48,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142328030] [2022-11-25 22:14:48,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:48,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:14:48,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:14:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-25 22:14:48,774 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:14:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:49,013 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-25 22:14:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 22:14:49,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2022-11-25 22:14:49,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:49,015 INFO L225 Difference]: With dead ends: 49 [2022-11-25 22:14:49,015 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 22:14:49,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-25 22:14:49,017 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:49,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 54 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:14:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 22:14:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-25 22:14:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2022-11-25 22:14:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-25 22:14:49,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2022-11-25 22:14:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:49,024 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-25 22:14:49,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:14:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-25 22:14:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 22:14:49,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:49,025 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:49,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:49,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:49,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:49,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1012202345, now seen corresponding path program 2 times [2022-11-25 22:14:49,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:49,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073291680] [2022-11-25 22:14:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:49,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:49,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:14:49,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068087764] [2022-11-25 22:14:49,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:14:49,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:49,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:49,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:14:49,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:14:49,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:14:49,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:14:49,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:14:49,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:14:49,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:49,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073291680] [2022-11-25 22:14:49,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:14:49,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068087764] [2022-11-25 22:14:49,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068087764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:49,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [993237962] [2022-11-25 22:14:49,486 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:14:49,486 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:49,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:49,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:49,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:49,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,611 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:14:49,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:14:49,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,719 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:14:49,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:14:49,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:49,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:14:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:49,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:49,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:49,963 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:14:49,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:14:50,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:50,072 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:14:50,073 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:14:50,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:50,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:50,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:50,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:50,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:50,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:50,185 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:14:50,186 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:14:50,304 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:14:50,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:51,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:51,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:51,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:14:51,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-25 22:14:51,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631358558] [2022-11-25 22:14:51,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:51,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:14:51,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:14:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-25 22:14:51,771 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:14:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:51,864 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-25 22:14:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:14:51,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-25 22:14:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:51,865 INFO L225 Difference]: With dead ends: 28 [2022-11-25 22:14:51,865 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 22:14:51,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:14:51,867 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:51,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 43 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:14:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 22:14:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-25 22:14:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:14:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-25 22:14:51,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2022-11-25 22:14:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:51,874 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-25 22:14:51,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 22:14:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-25 22:14:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 22:14:51,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:51,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:51,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:52,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:52,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:52,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2055356873, now seen corresponding path program 3 times [2022-11-25 22:14:52,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:52,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413099922] [2022-11-25 22:14:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:52,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:52,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:14:52,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66244973] [2022-11-25 22:14:52,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:14:52,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:52,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:52,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:52,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:14:52,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:14:52,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:14:52,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-25 22:14:52,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:52,315 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 10 treesize of output 8 [2022-11-25 22:14:52,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:52,361 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-25 22:14:52,367 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-25 22:14:52,371 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 8 treesize of output 7 [2022-11-25 22:14:52,379 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 8 treesize of output 7 [2022-11-25 22:14:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:52,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 52 [2022-11-25 22:14:52,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:52,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:52,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:52,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-25 22:14:52,989 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:14:52,990 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 330 treesize of output 213 [2022-11-25 22:14:53,002 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 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-25 22:14:53,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-25 22:14:53,085 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-25 22:14:53,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 217 [2022-11-25 22:14:53,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-25 22:14:53,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:53,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:53,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-25 22:14:53,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 11 [2022-11-25 22:14:53,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 156 treesize of output 132 [2022-11-25 22:14:53,277 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-25 22:14:53,278 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 63 treesize of output 52 [2022-11-25 22:14:53,286 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 17 treesize of output 11 [2022-11-25 22:14:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:53,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:53,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:53,832 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-11-25 22:14:53,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 122 treesize of output 54 [2022-11-25 22:14:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:53,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:54,161 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_213 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_213) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0)) (not (< 2 c_~ARR_SIZE~0))) is different from false [2022-11-25 22:14:54,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:54,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413099922] [2022-11-25 22:14:54,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:14:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66244973] [2022-11-25 22:14:54,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66244973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1800071676] [2022-11-25 22:14:54,400 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:14:54,401 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:54,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:54,401 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:54,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:54,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,519 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:14:54,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:14:54,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-25 22:14:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:54,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:14:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:54,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:54,727 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:14:54,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:14:54,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:54,837 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:14:54,837 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:14:54,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:54,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:54,941 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:14:54,942 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:14:55,028 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:14:55,052 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:56,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '788#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:56,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:56,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:14:56,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-25 22:14:56,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221583937] [2022-11-25 22:14:56,732 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:56,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 22:14:56,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 22:14:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=4, NotChecked=70, Total=1406 [2022-11-25 22:14:56,734 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:14:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:57,487 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-25 22:14:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 22:14:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-25 22:14:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:57,491 INFO L225 Difference]: With dead ends: 45 [2022-11-25 22:14:57,491 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 22:14:57,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=4, NotChecked=80, Total=1806 [2022-11-25 22:14:57,492 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:57,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 92 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:14:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 22:14:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-11-25 22:14:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:14:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-25 22:14:57,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2022-11-25 22:14:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:57,504 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-25 22:14:57,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:14:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-25 22:14:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 22:14:57,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:57,506 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:57,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:57,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:57,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash -708711620, now seen corresponding path program 4 times [2022-11-25 22:14:57,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:57,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261827955] [2022-11-25 22:14:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:57,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:14:57,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088922118] [2022-11-25 22:14:57,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:14:57,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:57,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:57,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:57,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:14:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:57,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:14:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:14:57,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:14:58,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261827955] [2022-11-25 22:14:58,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:14:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088922118] [2022-11-25 22:14:58,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088922118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97973337] [2022-11-25 22:14:58,021 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:14:58,022 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:58,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:58,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:58,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,119 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:14:58,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:14:58,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,248 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:14:58,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:14:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:14:58,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:58,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:58,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:58,508 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-11-25 22:14:58,509 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 371 treesize of output 364 [2022-11-25 22:14:58,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:58,895 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:14:58,895 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:14:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:58,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:58,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:58,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:14:58,974 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:14:58,974 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:14:59,070 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:14:59,093 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:00,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1079#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:00,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:00,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:15:00,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-25 22:15:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356602268] [2022-11-25 22:15:00,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:00,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 22:15:00,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:00,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 22:15:00,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:15:00,583 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:00,765 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-11-25 22:15:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:15:00,765 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-25 22:15:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:00,766 INFO L225 Difference]: With dead ends: 57 [2022-11-25 22:15:00,766 INFO L226 Difference]: Without dead ends: 48 [2022-11-25 22:15:00,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 22:15:00,768 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:00,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 69 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:15:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-25 22:15:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-11-25 22:15:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:15:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-25 22:15:00,804 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2022-11-25 22:15:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:00,804 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-25 22:15:00,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-25 22:15:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 22:15:00,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:00,806 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:00,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:01,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 22:15:01,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash -123210237, now seen corresponding path program 5 times [2022-11-25 22:15:01,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:01,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111563972] [2022-11-25 22:15:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:01,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:01,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361673696] [2022-11-25 22:15:01,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:15:01,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:01,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:01,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:01,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:15:01,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 22:15:01,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:15:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:15:01,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:01,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:15:01,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:01,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111563972] [2022-11-25 22:15:01,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:01,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361673696] [2022-11-25 22:15:01,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361673696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:01,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577694659] [2022-11-25 22:15:01,380 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:15:01,380 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:01,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:01,381 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:01,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:01,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,491 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:15:01,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:15:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,586 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:15:01,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:15:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:01,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:15:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:01,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:01,770 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:15:01,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:15:01,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:01,862 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:15:01,862 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:15:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:01,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:01,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:01,947 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:01,947 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:02,063 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:15:02,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:03,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1401#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:03,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:03,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:15:03,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-25 22:15:03,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601078030] [2022-11-25 22:15:03,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:03,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 22:15:03,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 22:15:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:15:03,435 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:03,602 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-11-25 22:15:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:15:03,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-25 22:15:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:03,604 INFO L225 Difference]: With dead ends: 48 [2022-11-25 22:15:03,604 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 22:15:03,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 22:15:03,606 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:03,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 47 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:15:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 22:15:03,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-11-25 22:15:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:15:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-11-25 22:15:03,623 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-11-25 22:15:03,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:03,623 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-11-25 22:15:03,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-11-25 22:15:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 22:15:03,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:03,624 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:03,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:03,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:15:03,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash 475184706, now seen corresponding path program 6 times [2022-11-25 22:15:03,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:03,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729210515] [2022-11-25 22:15:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:03,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:03,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:03,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691088550] [2022-11-25 22:15:03,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:15:03,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:03,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:03,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:15:04,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:15:04,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:15:04,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-25 22:15:04,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:04,091 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 10 treesize of output 8 [2022-11-25 22:15:04,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,126 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-25 22:15:04,135 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-25 22:15:04,139 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 8 treesize of output 7 [2022-11-25 22:15:04,145 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 8 treesize of output 7 [2022-11-25 22:15:04,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,210 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 52 treesize of output 41 [2022-11-25 22:15:04,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:04,308 INFO L321 Elim1Store]: treesize reduction 42, result has 31.1 percent of original size [2022-11-25 22:15:04,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 82 [2022-11-25 22:15:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:04,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:04,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:04,421 INFO L321 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-11-25 22:15:04,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 164 treesize of output 103 [2022-11-25 22:15:05,120 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:15:05,120 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 419 treesize of output 280 [2022-11-25 22:15:05,140 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 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-25 22:15:05,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-25 22:15:05,205 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-25 22:15:05,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 275 treesize of output 298 [2022-11-25 22:15:05,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,319 INFO L321 Elim1Store]: treesize reduction 154, result has 16.8 percent of original size [2022-11-25 22:15:05,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 227 [2022-11-25 22:15:05,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,427 INFO L321 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2022-11-25 22:15:05,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 86 [2022-11-25 22:15:05,602 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-25 22:15:05,602 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 144 treesize of output 135 [2022-11-25 22:15:05,615 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 47 treesize of output 35 [2022-11-25 22:15:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:05,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:05,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:15:05,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 124 [2022-11-25 22:15:07,348 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-25 22:15:07,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 207 treesize of output 83 [2022-11-25 22:15:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:07,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:08,064 WARN L837 $PredicateComparison]: unable to prove that (or (not (< 3 c_~ARR_SIZE~0)) (forall ((v_ArrVal_458 (Array Int Int)) (v_ArrVal_457 (Array Int Int)) (|ULTIMATE.start_main_~index~0#1| Int)) (or (<= |ULTIMATE.start_main_~index~0#1| 0) (= (let ((.cse3 (* 4 |ULTIMATE.start_main_~index~0#1|))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_457) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_458) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse4 (+ .cse3 (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset|))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (+ (select .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4))))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0) (<= c_~ARR_SIZE~0 (+ |ULTIMATE.start_main_~index~0#1| 1))))) is different from false [2022-11-25 22:15:08,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729210515] [2022-11-25 22:15:08,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691088550] [2022-11-25 22:15:08,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691088550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:15:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897101186] [2022-11-25 22:15:08,071 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:15:08,071 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:08,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:08,072 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:08,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,184 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:15:08,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:15:08,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-25 22:15:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:08,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:15:08,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:08,384 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:15:08,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:15:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:08,490 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:15:08,490 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:15:08,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:08,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:08,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:08,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:08,566 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:08,567 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:08,659 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:15:08,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:10,655 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1694#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:10,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:10,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:15:10,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-25 22:15:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839692760] [2022-11-25 22:15:10,656 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:10,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:15:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:15:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1361, Unknown=2, NotChecked=76, Total=1640 [2022-11-25 22:15:10,658 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:12,294 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-11-25 22:15:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 22:15:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-25 22:15:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:12,296 INFO L225 Difference]: With dead ends: 61 [2022-11-25 22:15:12,296 INFO L226 Difference]: Without dead ends: 58 [2022-11-25 22:15:12,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=256, Invalid=1726, Unknown=2, NotChecked=86, Total=2070 [2022-11-25 22:15:12,297 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:12,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 116 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:15:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-25 22:15:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-25 22:15:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 22:15:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-25 22:15:12,321 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2022-11-25 22:15:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:12,321 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-25 22:15:12,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-25 22:15:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:15:12,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:12,322 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:12,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 22:15:12,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:12,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:12,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:12,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1845558755, now seen corresponding path program 7 times [2022-11-25 22:15:12,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:12,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158999870] [2022-11-25 22:15:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:12,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:12,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:12,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316288492] [2022-11-25 22:15:12,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:15:12,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:12,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:12,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:12,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:15:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:12,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:15:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:12,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:15:12,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158999870] [2022-11-25 22:15:12,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316288492] [2022-11-25 22:15:12,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316288492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:12,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109080679] [2022-11-25 22:15:12,925 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:15:12,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:12,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:12,926 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:12,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:12,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:12,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,026 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:15:13,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:15:13,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-25 22:15:13,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:13,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:15:13,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:13,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:13,200 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:15:13,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:15:13,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:13,289 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:15:13,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:15:13,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:13,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:13,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:13,363 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:13,364 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:13,470 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:15:13,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:14,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2057#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:14,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:14,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:15:14,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-25 22:15:14,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659823278] [2022-11-25 22:15:14,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:14,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 22:15:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:14,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 22:15:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:15:14,948 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:15,293 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2022-11-25 22:15:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 22:15:15,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-25 22:15:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:15,295 INFO L225 Difference]: With dead ends: 81 [2022-11-25 22:15:15,295 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 22:15:15,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 22:15:15,296 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:15,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 86 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:15:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 22:15:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-11-25 22:15:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:15:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-11-25 22:15:15,322 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2022-11-25 22:15:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:15,322 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-11-25 22:15:15,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-11-25 22:15:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:15:15,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:15,324 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:15,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:15,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:15,531 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1478734852, now seen corresponding path program 8 times [2022-11-25 22:15:15,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:15,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679562431] [2022-11-25 22:15:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:15,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:15,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860010388] [2022-11-25 22:15:15,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:15:15,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:15,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:15,546 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:15,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:15:15,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:15:15,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:15:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:15:15,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:15,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:15:16,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:16,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679562431] [2022-11-25 22:15:16,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:16,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860010388] [2022-11-25 22:15:16,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860010388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:16,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444493434] [2022-11-25 22:15:16,029 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:15:16,029 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:16,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:16,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:16,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:16,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,120 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:15:16,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:15:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,212 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:15:16,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:15:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:16,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:15:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:16,367 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:15:16,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:15:16,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:16,467 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:15:16,467 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:15:16,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:16,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:16,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:16,540 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:16,540 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:16,636 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:15:16,658 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:17,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2469#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:17,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:17,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:15:17,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-25 22:15:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286301185] [2022-11-25 22:15:17,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:17,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 22:15:17,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 22:15:17,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:15:17,833 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:18,074 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-25 22:15:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:15:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-25 22:15:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:18,079 INFO L225 Difference]: With dead ends: 71 [2022-11-25 22:15:18,079 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 22:15:18,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 22:15:18,081 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:18,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 116 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:15:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 22:15:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2022-11-25 22:15:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:15:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-25 22:15:18,116 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2022-11-25 22:15:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:18,116 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-25 22:15:18,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-25 22:15:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 22:15:18,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:18,117 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:18,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:18,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 22:15:18,324 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1403594601, now seen corresponding path program 9 times [2022-11-25 22:15:18,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:18,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404040397] [2022-11-25 22:15:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:18,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:18,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:18,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823298433] [2022-11-25 22:15:18,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:15:18,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:18,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:18,338 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:18,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:15:18,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:15:18,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:15:18,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-25 22:15:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:18,777 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 10 treesize of output 8 [2022-11-25 22:15:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:18,815 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-25 22:15:18,823 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 44 [2022-11-25 22:15:18,828 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 19 treesize of output 16 [2022-11-25 22:15:18,836 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 21 treesize of output 19 [2022-11-25 22:15:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:18,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:18,957 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 52 treesize of output 41 [2022-11-25 22:15:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,054 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-25 22:15:19,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-11-25 22:15:19,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,174 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-11-25 22:15:19,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-11-25 22:15:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:19,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:19,314 INFO L321 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-11-25 22:15:19,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 206 treesize of output 133 [2022-11-25 22:15:20,314 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:15:20,314 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 461 treesize of output 312 [2022-11-25 22:15:20,335 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 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-25 22:15:20,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-25 22:15:20,436 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-25 22:15:20,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 330 [2022-11-25 22:15:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,709 INFO L321 Elim1Store]: treesize reduction 109, result has 31.9 percent of original size [2022-11-25 22:15:20,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 108 treesize of output 165 [2022-11-25 22:15:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:20,884 INFO L321 Elim1Store]: treesize reduction 231, result has 16.6 percent of original size [2022-11-25 22:15:20,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 274 treesize of output 321 [2022-11-25 22:15:21,933 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-25 22:15:21,934 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 1236 treesize of output 1145 [2022-11-25 22:15:22,021 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 29 treesize of output 23 [2022-11-25 22:15:25,624 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 22:15:25,625 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 364 treesize of output 270 [2022-11-25 22:15:25,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:15:25,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 294 treesize of output 392 [2022-11-25 22:15:25,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:15:25,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 395 [2022-11-25 22:15:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:32,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:33,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:33,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404040397] [2022-11-25 22:15:33,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:33,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823298433] [2022-11-25 22:15:33,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823298433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:15:33,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845933362] [2022-11-25 22:15:33,702 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:15:33,703 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:33,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:33,703 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:33,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:33,802 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:15:33,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:15:33,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:33,892 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:15:33,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:15:33,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:33,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:33,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:33,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:15:34,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:34,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:34,062 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:15:34,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:15:34,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:34,155 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:15:34,156 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:15:34,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:34,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:34,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:34,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:34,222 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:34,222 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:34,298 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:15:34,315 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:36,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2837#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:36,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:36,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:15:36,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-25 22:15:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025132240] [2022-11-25 22:15:36,393 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 22:15:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 22:15:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1651, Unknown=3, NotChecked=0, Total=1892 [2022-11-25 22:15:36,395 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:38,683 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-11-25 22:15:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:15:38,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-25 22:15:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:38,685 INFO L225 Difference]: With dead ends: 79 [2022-11-25 22:15:38,685 INFO L226 Difference]: Without dead ends: 76 [2022-11-25 22:15:38,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=298, Invalid=2051, Unknown=3, NotChecked=0, Total=2352 [2022-11-25 22:15:38,687 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:38,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 145 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 22:15:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-25 22:15:38,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-11-25 22:15:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:15:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-11-25 22:15:38,717 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2022-11-25 22:15:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:38,717 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-11-25 22:15:38,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:15:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-11-25 22:15:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:15:38,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:38,719 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:38,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:38,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:15:38,921 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1777613253, now seen corresponding path program 1 times [2022-11-25 22:15:38,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:38,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110072328] [2022-11-25 22:15:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:38,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:38,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:38,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646619656] [2022-11-25 22:15:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:38,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:38,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:38,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:15:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-25 22:15:39,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:39,141 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 10 treesize of output 8 [2022-11-25 22:15:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,169 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-25 22:15:39,173 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-25 22:15:39,177 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 8 treesize of output 7 [2022-11-25 22:15:39,183 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 8 treesize of output 7 [2022-11-25 22:15:39,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-25 22:15:39,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-25 22:15:39,758 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:15:39,758 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 103 [2022-11-25 22:15:39,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-11-25 22:15:39,797 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-25 22:15:39,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 93 [2022-11-25 22:15:39,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,819 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 0 case distinctions, treesize of input 35 treesize of output 44 [2022-11-25 22:15:39,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:39,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:39,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:39,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-25 22:15:39,846 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 28 treesize of output 17 [2022-11-25 22:15:39,851 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 17 treesize of output 11 [2022-11-25 22:15:40,342 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:15:40,343 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 368 treesize of output 245 [2022-11-25 22:15:40,352 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 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-25 22:15:40,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-25 22:15:40,411 INFO L321 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2022-11-25 22:15:40,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 221 [2022-11-25 22:15:40,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-25 22:15:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:40,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:40,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:40,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 49 [2022-11-25 22:15:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:40,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 219 [2022-11-25 22:15:40,710 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 29 treesize of output 23 [2022-11-25 22:15:40,809 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 29 treesize of output 23 [2022-11-25 22:15:41,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:41,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:41,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:41,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:41,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:41,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:41,227 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-11-25 22:15:41,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 142 treesize of output 58 [2022-11-25 22:15:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:41,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:42,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110072328] [2022-11-25 22:15:42,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646619656] [2022-11-25 22:15:42,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646619656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:15:42,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449828982] [2022-11-25 22:15:42,325 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:15:42,325 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:42,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:42,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:42,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,423 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:15:42,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:15:42,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,523 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:15:42,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:15:42,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:15:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,697 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:15:42,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:15:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,788 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:15:42,789 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:15:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,855 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:42,855 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:42,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:42,924 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:42,924 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:43,011 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:15:43,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:45,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3232#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:45,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:45,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:15:45,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-25 22:15:45,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980552265] [2022-11-25 22:15:45,023 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 22:15:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 22:15:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1551, Unknown=7, NotChecked=0, Total=1722 [2022-11-25 22:15:45,025 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:15:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:46,808 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-11-25 22:15:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:15:46,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-11-25 22:15:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:46,809 INFO L225 Difference]: With dead ends: 75 [2022-11-25 22:15:46,809 INFO L226 Difference]: Without dead ends: 55 [2022-11-25 22:15:46,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=296, Invalid=2348, Unknown=8, NotChecked=0, Total=2652 [2022-11-25 22:15:46,811 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:46,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 131 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:15:46,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-25 22:15:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-11-25 22:15:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 22:15:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-11-25 22:15:46,836 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2022-11-25 22:15:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:46,837 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-11-25 22:15:46,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 22:15:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-11-25 22:15:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 22:15:46,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:46,838 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:46,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:47,043 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash 561494428, now seen corresponding path program 10 times [2022-11-25 22:15:47,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:47,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161027336] [2022-11-25 22:15:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:47,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:47,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512680501] [2022-11-25 22:15:47,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:15:47,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:47,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:47,072 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:47,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:15:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 22:15:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:47,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:15:47,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:47,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161027336] [2022-11-25 22:15:47,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:47,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512680501] [2022-11-25 22:15:47,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512680501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:47,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758492854] [2022-11-25 22:15:47,475 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:15:47,475 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:47,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:47,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:47,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,584 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:15:47,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:15:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,668 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:15:47,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:15:47,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:47,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:15:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:47,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:47,834 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:15:47,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:15:47,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:47,920 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:15:47,920 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:15:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:47,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:47,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:47,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:47,996 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:47,996 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:48,076 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:15:48,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:49,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3648#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:49,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:49,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:15:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-25 22:15:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302178797] [2022-11-25 22:15:49,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 22:15:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 22:15:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:15:49,339 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:49,752 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-11-25 22:15:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:15:49,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-25 22:15:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:49,755 INFO L225 Difference]: With dead ends: 86 [2022-11-25 22:15:49,755 INFO L226 Difference]: Without dead ends: 75 [2022-11-25 22:15:49,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 22:15:49,756 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:49,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 86 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:15:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-25 22:15:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-11-25 22:15:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:15:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-11-25 22:15:49,801 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 27 [2022-11-25 22:15:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:49,802 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-11-25 22:15:49,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-11-25 22:15:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 22:15:49,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:49,803 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:49,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:50,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:15:50,007 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash 587607715, now seen corresponding path program 11 times [2022-11-25 22:15:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729414140] [2022-11-25 22:15:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:50,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:50,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:50,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504941237] [2022-11-25 22:15:50,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:15:50,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:50,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:50,021 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:50,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:15:50,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:15:50,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:15:50,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 22:15:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:15:50,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:15:50,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729414140] [2022-11-25 22:15:50,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:15:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504941237] [2022-11-25 22:15:50,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504941237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393002768] [2022-11-25 22:15:50,580 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:15:50,580 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:50,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:50,581 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:50,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,674 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:15:50,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:15:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,757 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:15:50,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:15:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:50,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:15:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:50,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:50,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:50,928 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:15:50,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:15:51,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:51,023 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:15:51,023 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:15:51,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:51,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:51,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:51,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:51,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:51,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:51,099 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:15:51,100 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:15:51,177 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:15:51,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:52,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4095#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:52,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:52,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:15:52,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-25 22:15:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244889000] [2022-11-25 22:15:52,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:52,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 22:15:52,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 22:15:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:15:52,379 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:52,702 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2022-11-25 22:15:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 22:15:52,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-25 22:15:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:52,703 INFO L225 Difference]: With dead ends: 75 [2022-11-25 22:15:52,703 INFO L226 Difference]: Without dead ends: 72 [2022-11-25 22:15:52,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 22:15:52,704 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:52,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 110 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:15:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-25 22:15:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2022-11-25 22:15:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 22:15:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-11-25 22:15:52,745 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 27 [2022-11-25 22:15:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:52,746 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-11-25 22:15:52,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 22:15:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-11-25 22:15:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:15:52,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:52,747 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:15:52,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:52,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:15:52,954 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:15:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1035704738, now seen corresponding path program 12 times [2022-11-25 22:15:52,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:52,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59227513] [2022-11-25 22:15:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:52,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:52,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:15:52,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402375230] [2022-11-25 22:15:52,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:15:52,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:52,972 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:52,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:15:53,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:15:53,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:15:53,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 137 conjunts are in the unsatisfiable core [2022-11-25 22:15:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:53,513 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 10 treesize of output 8 [2022-11-25 22:15:53,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,561 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-25 22:15:53,565 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-25 22:15:53,569 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 8 treesize of output 7 [2022-11-25 22:15:53,575 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 8 treesize of output 7 [2022-11-25 22:15:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,624 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 79 treesize of output 56 [2022-11-25 22:15:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,705 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-25 22:15:53,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-11-25 22:15:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,835 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-11-25 22:15:53,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-11-25 22:15:53,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:53,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:53,969 INFO L321 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-11-25 22:15:53,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 162 treesize of output 157 [2022-11-25 22:15:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:54,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:54,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:15:54,151 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-11-25 22:15:54,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 248 treesize of output 163 [2022-11-25 22:15:55,314 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:15:55,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 503 treesize of output 344 [2022-11-25 22:15:55,336 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 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-25 22:15:55,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-25 22:15:55,435 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-25 22:15:55,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 362 [2022-11-25 22:15:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,702 INFO L321 Elim1Store]: treesize reduction 308, result has 16.5 percent of original size [2022-11-25 22:15:55,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 235 treesize of output 289 [2022-11-25 22:15:55,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:55,904 INFO L321 Elim1Store]: treesize reduction 152, result has 28.6 percent of original size [2022-11-25 22:15:55,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 132 [2022-11-25 22:15:56,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 56 treesize of output 42 [2022-11-25 22:15:56,099 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 43 treesize of output 31 [2022-11-25 22:16:01,631 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 22:16:01,632 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 874 treesize of output 754 [2022-11-25 22:16:01,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 749 treesize of output 673 [2022-11-25 22:16:01,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 770 treesize of output 872 [2022-11-25 22:16:02,280 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 5 [2022-11-25 22:16:02,429 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 5 [2022-11-25 22:16:02,494 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 5 [2022-11-25 22:16:02,557 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 5 [2022-11-25 22:16:02,611 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 5 [2022-11-25 22:16:02,649 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 5 [2022-11-25 22:16:02,725 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 5 [2022-11-25 22:16:02,760 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 5 [2022-11-25 22:16:02,807 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 5 [2022-11-25 22:16:02,853 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 5 [2022-11-25 22:16:03,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 206 [2022-11-25 22:16:03,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 127 [2022-11-25 22:16:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:03,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:09,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:09,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59227513] [2022-11-25 22:16:09,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:16:09,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402375230] [2022-11-25 22:16:09,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402375230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:09,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1289923556] [2022-11-25 22:16:09,080 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:16:09,080 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:16:09,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:16:09,080 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:16:09,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:16:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,174 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-25 22:16:09,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-25 22:16:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,268 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:16:09,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:16:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:09,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-25 22:16:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:09,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:09,430 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-25 22:16:09,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-25 22:16:09,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:09,516 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-25 22:16:09,517 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 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-25 22:16:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:09,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:09,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:09,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:09,588 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-25 22:16:09,588 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-25 22:16:09,649 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-25 22:16:09,666 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:16:12,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4491#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:16:12,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:16:12,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:16:12,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-25 22:16:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567106851] [2022-11-25 22:16:12,082 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 22:16:12,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 22:16:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 22:16:12,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1887, Unknown=7, NotChecked=0, Total=2162 [2022-11-25 22:16:12,085 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:16:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:15,597 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-11-25 22:16:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:16:15,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-25 22:16:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:15,600 INFO L225 Difference]: With dead ends: 83 [2022-11-25 22:16:15,600 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 22:16:15,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=330, Invalid=2315, Unknown=7, NotChecked=0, Total=2652 [2022-11-25 22:16:15,601 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:15,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 145 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 22:16:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 22:16:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-11-25 22:16:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 22:16:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-11-25 22:16:15,641 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 28 [2022-11-25 22:16:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:15,641 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-11-25 22:16:15,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:16:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-11-25 22:16:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 22:16:15,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:15,642 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:15,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:16:15,843 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1177873296, now seen corresponding path program 2 times [2022-11-25 22:16:15,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:15,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257484509] [2022-11-25 22:16:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:15,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:15,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:16:15,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446406567] [2022-11-25 22:16:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:16:15,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:15,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:15,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:15,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c3a6e8-9783-4186-ab76-2543b3e41bec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:16:16,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:16:16,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:16:16,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-25 22:16:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:16,354 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 10 treesize of output 8 [2022-11-25 22:16:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:16,386 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-25 22:16:16,392 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 21 treesize of output 19 [2022-11-25 22:16:16,396 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 42 treesize of output 39 [2022-11-25 22:16:16,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:16,446 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2022-11-25 22:16:16,452 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2022-11-25 22:16:16,457 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 41 treesize of output 44 [2022-11-25 22:16:16,470 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 36 treesize of output 38 [2022-11-25 22:16:16,580 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-25 22:16:16,580 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 173 treesize of output 147 [2022-11-25 22:16:16,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 53 [2022-11-25 22:16:16,634 INFO L321 Elim1Store]: treesize reduction 56, result has 8.2 percent of original size [2022-11-25 22:16:16,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 105 [2022-11-25 22:16:16,653 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 0 case distinctions, treesize of input 52 treesize of output 59 [2022-11-25 22:16:16,668 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 0 case distinctions, treesize of input 60 treesize of output 68 [2022-11-25 22:16:16,737 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-25 22:16:16,737 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 86 treesize of output 75 [2022-11-25 22:16:16,762 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 14 treesize of output 7 [2022-11-25 22:16:16,895 INFO L321 Elim1Store]: treesize reduction 33, result has 13.2 percent of original size [2022-11-25 22:16:16,895 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 139 [2022-11-25 22:16:16,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 49 [2022-11-25 22:16:16,934 INFO L321 Elim1Store]: treesize reduction 54, result has 8.5 percent of original size [2022-11-25 22:16:16,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 101 [2022-11-25 22:16:16,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 66 [2022-11-25 22:16:16,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 66 [2022-11-25 22:16:17,675 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-25 22:16:17,676 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 427 treesize of output 304 [2022-11-25 22:16:17,688 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 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-25 22:16:17,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-25 22:16:17,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 250 [2022-11-25 22:16:17,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,863 INFO L321 Elim1Store]: treesize reduction 159, result has 14.1 percent of original size [2022-11-25 22:16:17,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 191 [2022-11-25 22:16:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:17,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-11-25 22:16:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:18,008 INFO L321 Elim1Store]: treesize reduction 81, result has 24.3 percent of original size [2022-11-25 22:16:18,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 130 [2022-11-25 22:16:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:18,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 125 treesize of output 112 [2022-11-25 22:16:18,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 88 treesize of output 50 [2022-11-25 22:16:18,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 60 [2022-11-25 22:16:18,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:18,333 INFO L321 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2022-11-25 22:16:18,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 68 [2022-11-25 22:16:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:18,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:16:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:18,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2022-11-25 22:16:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:22,190 INFO L321 Elim1Store]: treesize reduction 1027, result has 31.2 percent of original size [2022-11-25 22:16:22,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 21 select indices, 21 select index equivalence classes, 20 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 102 case distinctions, treesize of input 358 treesize of output 646 [2022-11-25 22:16:43,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:43,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:17:41,319 WARN L233 SmtUtils]: Spent 58.23s on a formula simplification. DAG size of input: 1921 DAG size of output: 868 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 22:17:41,323 INFO L321 Elim1Store]: treesize reduction 7488, result has 32.9 percent of original size [2022-11-25 22:17:41,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 43 select indices, 43 select index equivalence classes, 6 disjoint index pairs (out of 903 index pairs), introduced 43 new quantified variables, introduced 903 case distinctions, treesize of input 565 treesize of output 3853