./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba --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 d56d00b0e11a2318dd34043554d32ecd228c75c86ba1d3fcabadd2cc271a05aa --- 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-b5237d8 [2022-11-22 02:35:47,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:35:47,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:35:47,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:35:47,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:35:47,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:35:47,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:35:47,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:35:47,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:35:47,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:35:47,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:35:47,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:35:47,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:35:47,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:35:47,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:35:47,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:35:47,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:35:47,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:35:47,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:35:47,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:35:47,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:35:47,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:35:47,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:35:47,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:35:47,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:35:47,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:35:47,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:35:47,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:35:47,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:35:47,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:35:47,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:35:47,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:35:47,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:35:47,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:35:47,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:35:47,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:35:47,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:35:47,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:35:47,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:35:47,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:35:47,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:35:47,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:35:47,749 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:35:47,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:35:47,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:35:47,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:35:47,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:35:47,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:35:47,752 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:35:47,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:35:47,752 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:35:47,753 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:35:47,754 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:35:47,754 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:35:47,754 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:35:47,754 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:35:47,755 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:35:47,755 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:35:47,755 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:35:47,755 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:35:47,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:35:47,756 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:35:47,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:35:47,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:35:47,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:35:47,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:35:47,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:35:47,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:35:47,758 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:35:47,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:35:47,758 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:35:47,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:35:47,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:35:47,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:35:47,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:35:47,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:35:47,760 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:35:47,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:35:47,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:35:47,760 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:35:47,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:35:47,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:35:47,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:35:47,761 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_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d00b0e11a2318dd34043554d32ecd228c75c86ba1d3fcabadd2cc271a05aa [2022-11-22 02:35:48,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:35:48,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:35:48,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:35:48,126 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:35:48,126 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:35:48,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-programs/partial_mod_count_4.c [2022-11-22 02:35:51,098 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:35:51,297 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:35:51,298 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/sv-benchmarks/c/array-programs/partial_mod_count_4.c [2022-11-22 02:35:51,304 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/data/7007588ee/748f1a88f34148c49fca0ff87a22b2d8/FLAG7dfcdd4a9 [2022-11-22 02:35:51,330 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/data/7007588ee/748f1a88f34148c49fca0ff87a22b2d8 [2022-11-22 02:35:51,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:35:51,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:35:51,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:35:51,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:35:51,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:35:51,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b46bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51, skipping insertion in model container [2022-11-22 02:35:51,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:35:51,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:35:51,567 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_91851d63-098c-4b25-91c8-f35aa5bcefda/sv-benchmarks/c/array-programs/partial_mod_count_4.c[323,336] [2022-11-22 02:35:51,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:35:51,604 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:35:51,615 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_91851d63-098c-4b25-91c8-f35aa5bcefda/sv-benchmarks/c/array-programs/partial_mod_count_4.c[323,336] [2022-11-22 02:35:51,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:35:51,635 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:35:51,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51 WrapperNode [2022-11-22 02:35:51,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:35:51,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:35:51,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:35:51,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:35:51,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,665 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-11-22 02:35:51,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:35:51,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:35:51,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:35:51,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:35:51,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,690 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:35:51,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:35:51,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:35:51,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:35:51,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (1/1) ... [2022-11-22 02:35:51,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:35:51,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:51,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:35:51,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:35:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:35:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:35:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:35:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:35:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:35:51,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:35:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:35:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:35:51,853 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:35:51,855 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:35:52,107 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:35:52,214 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:35:52,214 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:35:52,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:35:52 BoogieIcfgContainer [2022-11-22 02:35:52,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:35:52,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:35:52,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:35:52,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:35:52,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:35:51" (1/3) ... [2022-11-22 02:35:52,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afb3ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:35:52, skipping insertion in model container [2022-11-22 02:35:52,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:35:51" (2/3) ... [2022-11-22 02:35:52,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afb3ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:35:52, skipping insertion in model container [2022-11-22 02:35:52,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:35:52" (3/3) ... [2022-11-22 02:35:52,241 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_4.c [2022-11-22 02:35:52,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:35:52,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:35:52,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:35:52,331 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;@73381ccd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:35:52,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:35:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:35:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:35:52,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:52,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:35:52,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:52,350 INFO L85 PathProgramCache]: Analyzing trace with hash 83296886, now seen corresponding path program 1 times [2022-11-22 02:35:52,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478846921] [2022-11-22 02:35:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:35:52,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:52,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478846921] [2022-11-22 02:35:52,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478846921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:52,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:35:52,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:35:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122638330] [2022-11-22 02:35:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:35:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:52,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:35:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:35:52,663 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:35:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:52,730 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-11-22 02:35:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:35:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 02:35:52,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:52,740 INFO L225 Difference]: With dead ends: 15 [2022-11-22 02:35:52,741 INFO L226 Difference]: Without dead ends: 8 [2022-11-22 02:35:52,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:35:52,755 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:52,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:35:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-22 02:35:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-22 02:35:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:35:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-22 02:35:52,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-22 02:35:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:52,808 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-22 02:35:52,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:35:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-22 02:35:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:35:52,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:52,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:35:52,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:35:52,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1709852021, now seen corresponding path program 1 times [2022-11-22 02:35:52,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:52,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192362619] [2022-11-22 02:35:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:52,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:52,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:35:52,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515241794] [2022-11-22 02:35:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:52,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:52,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:52,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:52,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:35:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:52,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:35:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:35:53,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:35:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:35:53,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:53,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192362619] [2022-11-22 02:35:53,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:35:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515241794] [2022-11-22 02:35:53,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515241794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:35:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1563808670] [2022-11-22 02:35:53,056 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 02:35:53,057 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:35:53,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:35:53,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:35:53,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:35:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:53,186 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:35:53,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:35:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:53,244 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:35:53,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:35:53,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:53,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:53,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-22 02:35:53,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:53,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-11-22 02:35:53,443 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 30 treesize of output 28 [2022-11-22 02:35:53,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:35:53,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:35:53,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:35:54,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1563808670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:54,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:35:54,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2022-11-22 02:35:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264331423] [2022-11-22 02:35:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:54,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:35:54,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:35:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:35:54,022 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:35:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:54,079 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-22 02:35:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:35:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 02:35:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:54,081 INFO L225 Difference]: With dead ends: 13 [2022-11-22 02:35:54,081 INFO L226 Difference]: Without dead ends: 11 [2022-11-22 02:35:54,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:35:54,086 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:54,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:35:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-22 02:35:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-22 02:35:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:35:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-22 02:35:54,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-22 02:35:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:54,095 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-22 02:35:54,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:35:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-22 02:35:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:35:54,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:54,097 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:54,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:35:54,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:54,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash 115757833, now seen corresponding path program 1 times [2022-11-22 02:35:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218156085] [2022-11-22 02:35:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:54,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:35:54,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48275185] [2022-11-22 02:35:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:54,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:54,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:54,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:54,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:35:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:54,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:35:54,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:35:54,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:35:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:35:54,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:54,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218156085] [2022-11-22 02:35:54,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:35:54,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48275185] [2022-11-22 02:35:54,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48275185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:35:54,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [322134618] [2022-11-22 02:35:54,479 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:35:54,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:35:54,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:35:54,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:35:54,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:35:54,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:54,536 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:35:54,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:35:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:54,601 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:35:54,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:35:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:54,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-22 02:35:54,690 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:35:54,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:54,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:54,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:54,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:35:54,914 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-22 02:35:54,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 523 treesize of output 583 [2022-11-22 02:35:54,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:35:54,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 316 treesize of output 306 [2022-11-22 02:35:55,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:35:55,334 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 02:35:55,335 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 3 case distinctions, treesize of input 679 treesize of output 670 [2022-11-22 02:35:55,390 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:35:55,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 648 treesize of output 642 [2022-11-22 02:35:55,744 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:36:02,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:36:02,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (<= 0 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2022-11-22 02:36:02,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:36:02,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:36:02,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-22 02:36:02,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515370453] [2022-11-22 02:36:02,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:36:02,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:36:02,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:36:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:36:02,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:36:02,161 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:02,219 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-22 02:36:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:36:02,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 02:36:02,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:02,220 INFO L225 Difference]: With dead ends: 20 [2022-11-22 02:36:02,220 INFO L226 Difference]: Without dead ends: 13 [2022-11-22 02:36:02,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:36:02,222 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:02,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:36:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-22 02:36:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-22 02:36:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-22 02:36:02,227 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-11-22 02:36:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:02,227 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-22 02:36:02,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-22 02:36:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:36:02,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:02,228 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:36:02,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:36:02,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:02,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:36:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1538090498, now seen corresponding path program 2 times [2022-11-22 02:36:02,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:36:02,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031746111] [2022-11-22 02:36:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:02,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:36:02,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:36:02,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392429481] [2022-11-22 02:36:02,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:36:02,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:02,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:02,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:02,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:36:02,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:36:02,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:36:02,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:36:02,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:02,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:02,763 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 57 treesize of output 45 [2022-11-22 02:36:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:36:02,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:03,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:03,200 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 102 treesize of output 90 [2022-11-22 02:36:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:36:03,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:36:03,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031746111] [2022-11-22 02:36:03,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:36:03,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392429481] [2022-11-22 02:36:03,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392429481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:36:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185985754] [2022-11-22 02:36:03,565 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:36:03,565 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:36:03,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:36:03,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:36:03,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:36:03,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:03,607 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:36:03,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:36:03,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:03,659 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:36:03,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:36:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:03,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-22 02:36:03,703 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:36:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:03,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:36:03,906 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-22 02:36:03,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 538 treesize of output 598 [2022-11-22 02:36:03,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:36:03,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 319 [2022-11-22 02:36:04,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:04,237 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 02:36:04,238 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 3 case distinctions, treesize of input 721 treesize of output 712 [2022-11-22 02:36:04,275 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:36:04,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 690 treesize of output 684 [2022-11-22 02:36:04,568 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:36:08,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:36:08,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:36:08,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:36:08,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '297#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:36:08,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:36:08,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:36:08,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-22 02:36:08,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199458514] [2022-11-22 02:36:08,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:36:08,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:36:08,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:36:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:36:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:36:08,970 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:09,142 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-22 02:36:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:36:09,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:36:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:09,143 INFO L225 Difference]: With dead ends: 26 [2022-11-22 02:36:09,143 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 02:36:09,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:36:09,145 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:09,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 7 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:36:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 02:36:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-22 02:36:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-22 02:36:09,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2022-11-22 02:36:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:09,151 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-22 02:36:09,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-22 02:36:09,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 02:36:09,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:09,152 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1] [2022-11-22 02:36:09,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:36:09,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:09,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:36:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:09,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1434217034, now seen corresponding path program 3 times [2022-11-22 02:36:09,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:36:09,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429264809] [2022-11-22 02:36:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:09,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:36:09,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:36:09,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938199345] [2022-11-22 02:36:09,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:36:09,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:09,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:09,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:09,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:36:09,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:36:09,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:36:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:36:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:36:09,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:36:09,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:36:09,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429264809] [2022-11-22 02:36:09,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:36:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938199345] [2022-11-22 02:36:09,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938199345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:36:09,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997978180] [2022-11-22 02:36:09,609 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:36:09,610 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:36:09,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:36:09,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:36:09,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:36:09,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:09,658 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:36:09,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:36:09,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:09,676 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:36:09,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:09,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-22 02:36:09,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:09,723 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 66 treesize of output 55 [2022-11-22 02:36:09,730 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 30 treesize of output 28 [2022-11-22 02:36:09,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:36:09,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:36:09,871 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:36:10,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:36:10,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:36:10,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:36:10,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-22 02:36:10,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730029722] [2022-11-22 02:36:10,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:36:10,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:36:10,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:36:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:36:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:36:10,312 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:10,363 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-11-22 02:36:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:36:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-22 02:36:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:10,365 INFO L225 Difference]: With dead ends: 44 [2022-11-22 02:36:10,365 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 02:36:10,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:36:10,366 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:10,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:36:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 02:36:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-22 02:36:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-11-22 02:36:10,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2022-11-22 02:36:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:10,374 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-11-22 02:36:10,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-11-22 02:36:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 02:36:10,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:10,375 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 4, 1, 1, 1, 1] [2022-11-22 02:36:10,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 02:36:10,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:10,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:36:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1116445290, now seen corresponding path program 4 times [2022-11-22 02:36:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:36:10,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132490315] [2022-11-22 02:36:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:10,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:36:10,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:36:10,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197005231] [2022-11-22 02:36:10,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:36:10,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:10,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:10,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:36:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:36:10,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:36:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:36:10,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:36:11,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:36:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132490315] [2022-11-22 02:36:11,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:36:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197005231] [2022-11-22 02:36:11,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197005231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:36:11,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2903395] [2022-11-22 02:36:11,167 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:36:11,167 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:36:11,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:36:11,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:36:11,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:36:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,214 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:36:11,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:36:11,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,264 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:36:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:36:11,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-22 02:36:11,311 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:36:11,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,438 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-22 02:36:11,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 557 treesize of output 609 [2022-11-22 02:36:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:11,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:11,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 372 treesize of output 365 [2022-11-22 02:36:11,642 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:36:12,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:36:12,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:36:12,141 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:36:12,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '801#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:36:12,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:36:12,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:36:12,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-22 02:36:12,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787114526] [2022-11-22 02:36:12,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:36:12,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:36:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:36:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:36:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:36:12,565 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:12,647 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-11-22 02:36:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:36:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-22 02:36:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:12,651 INFO L225 Difference]: With dead ends: 56 [2022-11-22 02:36:12,651 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 02:36:12,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:36:12,652 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:12,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:36:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 02:36:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-22 02:36:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-22 02:36:12,662 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 27 [2022-11-22 02:36:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:12,662 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-22 02:36:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-22 02:36:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 02:36:12,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:12,663 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 4, 1, 1, 1, 1] [2022-11-22 02:36:12,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:36:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:12,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:36:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash 530173270, now seen corresponding path program 5 times [2022-11-22 02:36:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:36:12,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125709071] [2022-11-22 02:36:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:12,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:36:12,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:36:12,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473014780] [2022-11-22 02:36:12,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:36:12,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:12,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:12,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:36:13,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 02:36:13,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:36:13,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:36:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:14,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:14,166 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 57 treesize of output 45 [2022-11-22 02:36:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-22 02:36:14,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:16,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:16,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 210 treesize of output 334 [2022-11-22 02:36:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-22 02:36:18,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:36:18,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125709071] [2022-11-22 02:36:18,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:36:18,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473014780] [2022-11-22 02:36:18,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473014780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:36:18,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794285757] [2022-11-22 02:36:18,662 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:36:18,662 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:36:18,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:36:18,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:36:18,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:36:18,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:18,698 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:36:18,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:36:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:18,736 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:36:18,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:36:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:18,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:18,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-22 02:36:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:18,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-11-22 02:36:18,788 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 40 [2022-11-22 02:36:18,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:36:18,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:36:18,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:36:19,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1207#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:36:19,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:36:19,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:36:19,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-22 02:36:19,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712033576] [2022-11-22 02:36:19,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:36:19,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:36:19,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:36:19,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:36:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:36:19,452 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:20,359 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-22 02:36:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:36:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-22 02:36:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:20,361 INFO L225 Difference]: With dead ends: 62 [2022-11-22 02:36:20,361 INFO L226 Difference]: Without dead ends: 60 [2022-11-22 02:36:20,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:36:20,362 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 72 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:20,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 13 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:36:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-22 02:36:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-11-22 02:36:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-11-22 02:36:20,378 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 39 [2022-11-22 02:36:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:20,379 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-11-22 02:36:20,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-11-22 02:36:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 02:36:20,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:20,380 INFO L195 NwaCegarLoop]: trace histogram [22, 11, 10, 10, 1, 1, 1, 1] [2022-11-22 02:36:20,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 02:36:20,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:20,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:36:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1399302570, now seen corresponding path program 6 times [2022-11-22 02:36:20,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:36:20,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334575826] [2022-11-22 02:36:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:20,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:36:20,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:36:20,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790517042] [2022-11-22 02:36:20,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:36:20,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:20,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:20,655 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:20,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:36:20,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:36:20,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:36:20,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:36:20,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-22 02:36:21,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-22 02:36:22,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:36:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334575826] [2022-11-22 02:36:22,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:36:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790517042] [2022-11-22 02:36:22,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790517042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:36:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073824593] [2022-11-22 02:36:22,166 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:36:22,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:36:22,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:36:22,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:36:22,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:36:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:22,216 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:36:22,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:36:22,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:22,228 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:36:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:22,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:22,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-22 02:36:22,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:22,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:22,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2022-11-22 02:36:22,281 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 30 treesize of output 28 [2022-11-22 02:36:22,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:36:22,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:36:22,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:36:22,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1801#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:36:22,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:36:22,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:36:22,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-22 02:36:22,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319830035] [2022-11-22 02:36:22,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:36:22,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-22 02:36:22,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:36:22,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-22 02:36:22,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1616, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 02:36:22,981 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:23,129 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-11-22 02:36:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-22 02:36:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-22 02:36:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:23,131 INFO L225 Difference]: With dead ends: 116 [2022-11-22 02:36:23,131 INFO L226 Difference]: Without dead ends: 82 [2022-11-22 02:36:23,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1140, Invalid=1616, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 02:36:23,133 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:23,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:36:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-22 02:36:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-22 02:36:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-11-22 02:36:23,152 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 57 [2022-11-22 02:36:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:23,153 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-11-22 02:36:23,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-11-22 02:36:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-22 02:36:23,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:23,155 INFO L195 NwaCegarLoop]: trace histogram [46, 11, 10, 10, 1, 1, 1, 1] [2022-11-22 02:36:23,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:36:23,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:23,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:36:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash -5413418, now seen corresponding path program 7 times [2022-11-22 02:36:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:36:23,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015540417] [2022-11-22 02:36:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:36:23,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:36:23,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972320694] [2022-11-22 02:36:23,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:36:23,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:23,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:23,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:36:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:36:23,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 02:36:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-22 02:36:25,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-22 02:36:28,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:36:28,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015540417] [2022-11-22 02:36:28,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:36:28,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972320694] [2022-11-22 02:36:28,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972320694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:36:28,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707822598] [2022-11-22 02:36:28,649 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:36:28,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:36:28,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:36:28,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:36:28,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:36:28,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:28,690 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:36:28,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:36:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:28,737 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:36:28,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:36:28,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:28,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-22 02:36:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:28,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:28,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2022-11-22 02:36:28,793 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 30 treesize of output 28 [2022-11-22 02:36:28,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:36:28,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:36:29,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:36:29,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2707#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:36:29,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:36:29,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:36:29,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2022-11-22 02:36:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647548662] [2022-11-22 02:36:29,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:36:29,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-22 02:36:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:36:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-22 02:36:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4576, Invalid=5524, Unknown=0, NotChecked=0, Total=10100 [2022-11-22 02:36:29,724 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:36:30,099 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2022-11-22 02:36:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-22 02:36:30,100 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-22 02:36:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:36:30,101 INFO L225 Difference]: With dead ends: 164 [2022-11-22 02:36:30,101 INFO L226 Difference]: Without dead ends: 130 [2022-11-22 02:36:30,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4576, Invalid=5524, Unknown=0, NotChecked=0, Total=10100 [2022-11-22 02:36:30,106 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:36:30,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:36:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-22 02:36:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-22 02:36:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-11-22 02:36:30,137 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 81 [2022-11-22 02:36:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:36:30,138 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-11-22 02:36:30,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:36:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-11-22 02:36:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-22 02:36:30,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:36:30,140 INFO L195 NwaCegarLoop]: trace histogram [94, 11, 10, 10, 1, 1, 1, 1] [2022-11-22 02:36:30,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:36:30,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 02:36:30,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:36:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:36:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1515455702, now seen corresponding path program 8 times [2022-11-22 02:36:30,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:36:30,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257983303] [2022-11-22 02:36:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:36:30,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:36:30,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:36:30,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081613844] [2022-11-22 02:36:30,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:36:30,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:36:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:36:30,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:36:30,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:36:48,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-22 02:36:48,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:36:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:36:48,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:36:50,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:50,346 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 57 treesize of output 45 [2022-11-22 02:36:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-22 02:36:50,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:58,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:36:58,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 294 treesize of output 366 [2022-11-22 02:37:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-22 02:37:12,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257983303] [2022-11-22 02:37:12,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081613844] [2022-11-22 02:37:12,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081613844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:12,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714564930] [2022-11-22 02:37:12,227 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:37:12,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:12,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:12,227 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:12,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,270 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:37:12,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:37:12,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,283 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:37:12,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-22 02:37:12,330 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:37:12,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,450 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-22 02:37:12,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 572 treesize of output 624 [2022-11-22 02:37:12,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:12,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:37:12,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 387 treesize of output 378 [2022-11-22 02:37:12,964 INFO L321 Elim1Store]: treesize reduction 63, result has 7.4 percent of original size [2022-11-22 02:37:12,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 604 treesize of output 611 [2022-11-22 02:37:12,999 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 587 treesize of output 566 [2022-11-22 02:37:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:13,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 211 [2022-11-22 02:37:13,310 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:37:13,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:37:13,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:37:14,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:14,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4025#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:37:14,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:37:14,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:37:14,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-22 02:37:14,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956708761] [2022-11-22 02:37:14,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:37:14,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 02:37:14,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 02:37:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:37:14,583 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:37:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:18,223 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2022-11-22 02:37:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 02:37:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-22 02:37:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:18,224 INFO L225 Difference]: With dead ends: 170 [2022-11-22 02:37:18,224 INFO L226 Difference]: Without dead ends: 168 [2022-11-22 02:37:18,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=833, Invalid=1923, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 02:37:18,226 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 106 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:18,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 24 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:37:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-22 02:37:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2022-11-22 02:37:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:37:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-11-22 02:37:18,262 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 129 [2022-11-22 02:37:18,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:18,263 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-11-22 02:37:18,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:37:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-11-22 02:37:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-22 02:37:18,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:18,266 INFO L195 NwaCegarLoop]: trace histogram [94, 23, 22, 22, 1, 1, 1, 1] [2022-11-22 02:37:18,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:18,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:18,475 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash 746264278, now seen corresponding path program 9 times [2022-11-22 02:37:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:18,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980157938] [2022-11-22 02:37:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:18,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:18,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:18,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331535170] [2022-11-22 02:37:18,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:37:18,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:18,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:18,558 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:18,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:37:19,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:37:19,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:37:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-22 02:37:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-22 02:37:24,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:37:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-22 02:37:38,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:37:38,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980157938] [2022-11-22 02:37:38,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:37:38,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331535170] [2022-11-22 02:37:38,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331535170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:37:38,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403348627] [2022-11-22 02:37:38,994 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:37:38,994 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:37:38,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:37:38,995 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:37:38,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:37:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:39,038 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:37:39,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:37:39,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:39,088 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:37:39,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:37:39,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:39,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-22 02:37:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:37:39,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2022-11-22 02:37:39,156 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 30 treesize of output 28 [2022-11-22 02:37:39,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:37:39,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:37:39,352 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:37:40,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5819#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:37:40,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:37:40,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:37:40,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2022-11-22 02:37:40,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977234729] [2022-11-22 02:37:40,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:37:40,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-22 02:37:40,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:37:40,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-22 02:37:40,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18352, Invalid=20260, Unknown=0, NotChecked=0, Total=38612 [2022-11-22 02:37:40,465 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:37:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:37:41,510 INFO L93 Difference]: Finished difference Result 332 states and 429 transitions. [2022-11-22 02:37:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-22 02:37:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-11-22 02:37:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:37:41,513 INFO L225 Difference]: With dead ends: 332 [2022-11-22 02:37:41,514 INFO L226 Difference]: Without dead ends: 262 [2022-11-22 02:37:41,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=18352, Invalid=20260, Unknown=0, NotChecked=0, Total=38612 [2022-11-22 02:37:41,520 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:37:41,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:37:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-22 02:37:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-11-22 02:37:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0076628352490422) internal successors, (263), 261 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:37:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2022-11-22 02:37:41,605 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 165 [2022-11-22 02:37:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:37:41,606 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2022-11-22 02:37:41,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:37:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2022-11-22 02:37:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-11-22 02:37:41,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:37:41,614 INFO L195 NwaCegarLoop]: trace histogram [190, 23, 22, 22, 1, 1, 1, 1] [2022-11-22 02:37:41,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:37:41,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:41,826 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:37:41,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:37:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash -411872042, now seen corresponding path program 10 times [2022-11-22 02:37:41,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:37:41,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145755520] [2022-11-22 02:37:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:37:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:37:41,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:37:41,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136743946] [2022-11-22 02:37:41,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:37:41,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:37:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:37:41,982 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:37:41,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:37:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-22 02:37:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18882 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-22 02:38:05,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18882 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-22 02:39:03,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145755520] [2022-11-22 02:39:03,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:39:03,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136743946] [2022-11-22 02:39:03,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136743946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:03,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1021727007] [2022-11-22 02:39:03,408 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 02:39:03,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:39:03,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:39:03,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:39:03,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:39:03,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:03,452 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:39:03,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:39:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:03,466 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:39:03,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:03,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-22 02:39:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:03,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:03,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2022-11-22 02:39:03,516 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 30 treesize of output 28 [2022-11-22 02:39:03,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:39:03,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-22 02:39:03,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:39:05,239 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8813#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:39:05,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:39:05,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:39:05,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192] total 383 [2022-11-22 02:39:05,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521397042] [2022-11-22 02:39:05,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:39:05,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-22 02:39:05,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:05,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-22 02:39:05,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73552, Invalid=77380, Unknown=0, NotChecked=0, Total=150932 [2022-11-22 02:39:05,283 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:08,216 INFO L93 Difference]: Finished difference Result 524 states and 717 transitions. [2022-11-22 02:39:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-22 02:39:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2022-11-22 02:39:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:08,220 INFO L225 Difference]: With dead ends: 524 [2022-11-22 02:39:08,220 INFO L226 Difference]: Without dead ends: 454 [2022-11-22 02:39:08,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 80.6s TimeCoverageRelationStatistics Valid=73552, Invalid=77380, Unknown=0, NotChecked=0, Total=150932 [2022-11-22 02:39:08,232 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:08,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:39:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-22 02:39:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-11-22 02:39:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.0044150110375276) internal successors, (455), 453 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2022-11-22 02:39:08,323 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 261 [2022-11-22 02:39:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:08,324 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2022-11-22 02:39:08,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:39:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2022-11-22 02:39:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-11-22 02:39:08,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:08,335 INFO L195 NwaCegarLoop]: trace histogram [382, 23, 22, 22, 1, 1, 1, 1] [2022-11-22 02:39:08,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:39:08,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:39:08,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:08,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2032914646, now seen corresponding path program 11 times [2022-11-22 02:39:08,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:08,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572901177] [2022-11-22 02:39:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:08,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:08,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:39:08,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978813310] [2022-11-22 02:39:08,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:39:08,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:08,805 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:39:08,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91851d63-098c-4b25-91c8-f35aa5bcefda/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process