./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:29:03,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:29:03,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:29:03,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:29:03,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:29:03,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:29:03,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:29:03,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:29:03,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:29:03,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:29:03,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:29:03,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:29:03,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:29:03,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:29:03,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:29:03,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:29:03,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:29:03,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:29:03,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:29:03,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:29:03,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:29:03,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:29:03,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:29:03,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:29:03,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:29:03,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:29:03,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:29:03,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:29:03,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:29:03,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:29:03,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:29:03,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:29:03,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:29:03,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:29:03,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:29:03,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:29:03,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:29:03,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:29:03,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:29:03,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:29:03,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:29:03,557 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:29:03,571 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:29:03,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:29:03,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:29:03,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:29:03,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:29:03,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:29:03,572 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:29:03,572 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:29:03,573 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:29:03,573 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:29:03,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:29:03,574 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:29:03,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:29:03,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:29:03,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:29:03,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:29:03,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:29:03,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:29:03,575 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:29:03,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:29:03,575 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:29:03,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:29:03,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:29:03,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:29:03,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:29:03,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:29:03,575 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:29:03,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:29:03,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:29:03,576 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:29:03,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:29:03,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:29:03,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:29:03,576 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_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2022-12-14 05:29:03,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:29:03,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:29:03,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:29:03,767 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:29:03,768 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:29:03,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-tiling/pnr3.c [2022-12-14 05:29:06,397 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:29:06,518 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:29:06,518 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/sv-benchmarks/c/array-tiling/pnr3.c [2022-12-14 05:29:06,523 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/data/fc52a50db/08ae5311bd7a4198908871eb0f148aeb/FLAGf884d74f0 [2022-12-14 05:29:06,533 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/data/fc52a50db/08ae5311bd7a4198908871eb0f148aeb [2022-12-14 05:29:06,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:29:06,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:29:06,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:29:06,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:29:06,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:29:06,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23787812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06, skipping insertion in model container [2022-12-14 05:29:06,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:29:06,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:29:06,682 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_1d28b562-4ef4-488c-b063-845a82410265/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-12-14 05:29:06,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:29:06,704 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:29:06,713 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_1d28b562-4ef4-488c-b063-845a82410265/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-12-14 05:29:06,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:29:06,729 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:29:06,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06 WrapperNode [2022-12-14 05:29:06,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:29:06,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:29:06,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:29:06,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:29:06,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,757 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-12-14 05:29:06,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:29:06,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:29:06,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:29:06,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:29:06,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,778 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:29:06,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:29:06,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:29:06,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:29:06,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (1/1) ... [2022-12-14 05:29:06,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:29:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:06,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:29:06,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:29:06,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:29:06,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:29:06,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 05:29:06,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 05:29:06,843 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-12-14 05:29:06,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-12-14 05:29:06,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:29:06,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:29:06,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 05:29:06,911 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:29:06,913 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:29:07,046 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:29:07,081 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:29:07,081 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 05:29:07,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:29:07 BoogieIcfgContainer [2022-12-14 05:29:07,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:29:07,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:29:07,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:29:07,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:29:07,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:29:06" (1/3) ... [2022-12-14 05:29:07,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400ed5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:29:07, skipping insertion in model container [2022-12-14 05:29:07,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:29:06" (2/3) ... [2022-12-14 05:29:07,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400ed5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:29:07, skipping insertion in model container [2022-12-14 05:29:07,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:29:07" (3/3) ... [2022-12-14 05:29:07,089 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr3.c [2022-12-14 05:29:07,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:29:07,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:29:07,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:29:07,143 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;@47bdf4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:29:07,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:29:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:29:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:29:07,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:07,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:07,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash 455092117, now seen corresponding path program 1 times [2022-12-14 05:29:07,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:07,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114020931] [2022-12-14 05:29:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:07,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:07,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:07,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114020931] [2022-12-14 05:29:07,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114020931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:29:07,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:29:07,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:29:07,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082618990] [2022-12-14 05:29:07,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:29:07,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:29:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:07,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:29:07,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:29:07,526 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:29:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:07,605 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-12-14 05:29:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:29:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-12-14 05:29:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:07,612 INFO L225 Difference]: With dead ends: 38 [2022-12-14 05:29:07,613 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 05:29:07,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:29:07,617 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:07,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 18 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:29:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 05:29:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-12-14 05:29:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:29:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-14 05:29:07,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2022-12-14 05:29:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:07,648 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-14 05:29:07,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:29:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-14 05:29:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 05:29:07,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:07,649 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:07,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:29:07,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:07,650 INFO L85 PathProgramCache]: Analyzing trace with hash -162168884, now seen corresponding path program 1 times [2022-12-14 05:29:07,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:07,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408709956] [2022-12-14 05:29:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:07,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:08,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408709956] [2022-12-14 05:29:08,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408709956] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575199359] [2022-12-14 05:29:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:08,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:08,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:08,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:29:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 05:29:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:08,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 05:29:08,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:08,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 05:29:08,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:08,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:29:08,667 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 05:29:08,675 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 31 treesize of output 17 [2022-12-14 05:29:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:08,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 61 [2022-12-14 05:29:08,733 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 16 treesize of output 12 [2022-12-14 05:29:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:08,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:08,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:08,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:29:08,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-12-14 05:29:08,988 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 05:29:08,988 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 17 treesize of output 13 [2022-12-14 05:29:08,996 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 11 treesize of output 4 [2022-12-14 05:29:09,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:09,002 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 28 treesize of output 25 [2022-12-14 05:29:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:09,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575199359] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521262928] [2022-12-14 05:29:09,081 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:29:09,081 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:09,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:29:09,087 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:29:09,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:29:09,163 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:29:09,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:29:09,182 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 [2022-12-14 05:29:09,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:29:09,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-12-14 05:29:09,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:09,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:09,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:09,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:09,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:09,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:09,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:09,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:09,723 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:29:09,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 869 treesize of output 892 [2022-12-14 05:29:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:09,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:09,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 697 [2022-12-14 05:29:10,058 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:29:10,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-12-14 05:29:10,069 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 438 treesize of output 396 [2022-12-14 05:29:12,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:12,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:12,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-12-14 05:29:12,304 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 30 treesize of output 16 [2022-12-14 05:29:12,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-12-14 05:29:12,331 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 166 treesize of output 124 [2022-12-14 05:29:12,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:12,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:12,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:12,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:13,486 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:29:13,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:29:14,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '236#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem12#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:29:14,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:29:14,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:14,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-14 05:29:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916464072] [2022-12-14 05:29:14,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:14,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 05:29:14,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:14,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 05:29:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-12-14 05:29:14,271 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 05:29:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:14,604 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-12-14 05:29:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:29:14,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 20 [2022-12-14 05:29:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:14,605 INFO L225 Difference]: With dead ends: 41 [2022-12-14 05:29:14,605 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 05:29:14,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 05:29:14,606 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:14,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 73 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:29:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 05:29:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2022-12-14 05:29:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:29:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 05:29:14,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 20 [2022-12-14 05:29:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:14,611 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 05:29:14,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 05:29:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 05:29:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 05:29:14,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:14,613 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:14,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:29:14,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:14,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash 670410786, now seen corresponding path program 1 times [2022-12-14 05:29:14,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:14,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140339575] [2022-12-14 05:29:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:14,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:15,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:15,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140339575] [2022-12-14 05:29:15,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140339575] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:15,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900104117] [2022-12-14 05:29:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:15,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:15,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:15,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:15,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:29:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:15,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 05:29:15,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:15,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:15,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-12-14 05:29:15,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 05:29:15,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2022-12-14 05:29:15,383 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 29 treesize of output 17 [2022-12-14 05:29:15,392 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 21 treesize of output 13 [2022-12-14 05:29:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:15,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:15,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:15,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:29:15,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:15,561 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 40 treesize of output 39 [2022-12-14 05:29:15,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:15,574 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 44 treesize of output 39 [2022-12-14 05:29:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:15,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900104117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:15,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741983289] [2022-12-14 05:29:15,649 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:29:15,649 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:15,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:29:15,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:29:15,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:29:15,694 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:29:15,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:29:15,702 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 [2022-12-14 05:29:15,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:29:15,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-12-14 05:29:15,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:16,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:16,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:16,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:16,168 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:29:16,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 892 treesize of output 915 [2022-12-14 05:29:16,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:16,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:16,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:16,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 775 treesize of output 750 [2022-12-14 05:29:16,402 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:29:16,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 496 [2022-12-14 05:29:16,417 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 438 treesize of output 396 [2022-12-14 05:29:18,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:18,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:18,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:29:18,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-12-14 05:29:18,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:18,428 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 24 treesize of output 13 [2022-12-14 05:29:18,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:18,452 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 148 treesize of output 121 [2022-12-14 05:29:18,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:18,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:18,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:18,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:19,499 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:29:19,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:29:20,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '510#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:29:20,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:29:20,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:20,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-14 05:29:20,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27542939] [2022-12-14 05:29:20,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:20,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 05:29:20,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 05:29:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 05:29:20,405 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 05:29:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:20,795 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-12-14 05:29:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 05:29:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 23 [2022-12-14 05:29:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:20,796 INFO L225 Difference]: With dead ends: 43 [2022-12-14 05:29:20,796 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 05:29:20,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=1913, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 05:29:20,797 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:20,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 80 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:29:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 05:29:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-12-14 05:29:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:29:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 05:29:20,803 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2022-12-14 05:29:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:20,803 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 05:29:20,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 05:29:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 05:29:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 05:29:20,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:20,804 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:20,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:29:21,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:21,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:21,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1558554594, now seen corresponding path program 2 times [2022-12-14 05:29:21,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:21,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301305784] [2022-12-14 05:29:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:21,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:21,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301305784] [2022-12-14 05:29:21,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301305784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104377455] [2022-12-14 05:29:21,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:29:21,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:21,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:21,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:21,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:29:21,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:29:21,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:29:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:29:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:21,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:29:21,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104377455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128278287] [2022-12-14 05:29:21,554 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:29:21,554 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:21,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:29:21,554 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:29:21,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:29:21,594 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:29:21,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:29:21,606 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 [2022-12-14 05:29:21,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:29:21,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-12-14 05:29:21,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:22,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:22,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:22,015 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:29:22,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 910 treesize of output 933 [2022-12-14 05:29:22,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:22,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:22,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:22,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 739 treesize of output 716 [2022-12-14 05:29:22,343 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:29:22,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-12-14 05:29:22,355 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 438 treesize of output 396 [2022-12-14 05:29:24,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:24,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:24,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:29:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:24,358 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 24 treesize of output 13 [2022-12-14 05:29:24,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:29:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:24,371 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 148 treesize of output 121 [2022-12-14 05:29:24,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:24,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:24,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:24,839 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 16 treesize of output 12 [2022-12-14 05:29:24,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:24,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:25,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:25,032 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 16 treesize of output 12 [2022-12-14 05:29:25,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:25,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:25,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:25,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:25,410 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:29:25,411 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:29:26,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '835#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:29:26,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:29:26,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:26,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2022-12-14 05:29:26,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580510265] [2022-12-14 05:29:26,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:26,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 05:29:26,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 05:29:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 05:29:26,323 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:29:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:26,511 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-12-14 05:29:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:29:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 29 [2022-12-14 05:29:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:26,512 INFO L225 Difference]: With dead ends: 54 [2022-12-14 05:29:26,512 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 05:29:26,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 05:29:26,513 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:26,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 34 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:29:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 05:29:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-12-14 05:29:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 05:29:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-12-14 05:29:26,520 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 29 [2022-12-14 05:29:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:26,520 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-12-14 05:29:26,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:29:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-12-14 05:29:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 05:29:26,521 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:26,521 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:26,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:29:26,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:26,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1347359527, now seen corresponding path program 3 times [2022-12-14 05:29:26,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:26,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079337672] [2022-12-14 05:29:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:26,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:27,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:27,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079337672] [2022-12-14 05:29:27,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079337672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:27,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757150455] [2022-12-14 05:29:27,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:29:27,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:27,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:27,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:27,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:29:27,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:29:27,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:29:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 05:29:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:27,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 05:29:27,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 05:29:27,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:27,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:29:27,633 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 05:29:27,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-12-14 05:29:27,638 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 31 treesize of output 17 [2022-12-14 05:29:27,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 05:29:27,672 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 22 treesize of output 14 [2022-12-14 05:29:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:27,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:28,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:28,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:29:28,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:28,071 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 40 treesize of output 39 [2022-12-14 05:29:28,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:28,101 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 44 treesize of output 39 [2022-12-14 05:29:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:28,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757150455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:28,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406755102] [2022-12-14 05:29:28,216 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:29:28,216 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:28,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:29:28,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:29:28,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:29:28,251 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 05:29:28,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 05:29:28,281 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:29:28,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:29:28,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:29:28,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 92 [2022-12-14 05:29:28,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:28,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:28,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:28,707 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:29:28,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 873 treesize of output 896 [2022-12-14 05:29:28,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:28,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:28,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 738 treesize of output 717 [2022-12-14 05:29:29,018 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:29:29,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 496 [2022-12-14 05:29:29,031 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 438 treesize of output 396 [2022-12-14 05:29:30,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:30,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:31,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:31,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:29:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:31,025 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 24 treesize of output 13 [2022-12-14 05:29:31,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:29:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:31,050 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 148 treesize of output 121 [2022-12-14 05:29:31,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:31,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:32,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:32,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:32,081 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:29:32,082 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:29:33,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1258#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:29:33,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:29:33,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:33,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-12-14 05:29:33,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515790278] [2022-12-14 05:29:33,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:33,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 05:29:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 05:29:33,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:29:33,188 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-12-14 05:29:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:34,602 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2022-12-14 05:29:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 05:29:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 42 [2022-12-14 05:29:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:34,604 INFO L225 Difference]: With dead ends: 74 [2022-12-14 05:29:34,604 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 05:29:34,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=565, Invalid=3725, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 05:29:34,607 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 193 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:34,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 124 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:29:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 05:29:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 36. [2022-12-14 05:29:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 05:29:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-14 05:29:34,617 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 42 [2022-12-14 05:29:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:34,617 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-14 05:29:34,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-12-14 05:29:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-14 05:29:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 05:29:34,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:34,618 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:34,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:29:34,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:34,820 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1582105589, now seen corresponding path program 4 times [2022-12-14 05:29:34,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:34,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547069196] [2022-12-14 05:29:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:34,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:35,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:35,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547069196] [2022-12-14 05:29:35,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547069196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377093394] [2022-12-14 05:29:35,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:29:35,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:35,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:35,225 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:35,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:29:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:35,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 05:29:35,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:35,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:35,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-12-14 05:29:35,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 05:29:35,484 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 05:29:35,491 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 29 treesize of output 17 [2022-12-14 05:29:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:35,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:35,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:35,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:29:35,858 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 11 treesize of output 4 [2022-12-14 05:29:35,866 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 05:29:35,866 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 19 treesize of output 13 [2022-12-14 05:29:35,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:35,872 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 30 treesize of output 25 [2022-12-14 05:29:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:35,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377093394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918809925] [2022-12-14 05:29:35,962 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:29:35,963 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:35,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:29:35,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:29:35,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:29:35,999 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:29:36,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:29:36,011 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 [2022-12-14 05:29:36,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:29:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2022-12-14 05:29:36,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:36,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:36,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:36,415 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:29:36,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 884 treesize of output 907 [2022-12-14 05:29:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:36,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:36,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 710 [2022-12-14 05:29:36,597 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:29:36,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-12-14 05:29:36,607 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 30 treesize of output 16 [2022-12-14 05:29:38,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:38,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:38,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:38,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:29:38,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:38,590 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 24 treesize of output 13 [2022-12-14 05:29:38,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:29:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:38,614 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 148 treesize of output 121 [2022-12-14 05:29:38,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:38,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:39,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:40,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:40,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:40,113 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:29:40,114 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:29:41,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1769#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:29:41,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:29:41,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:41,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 29 [2022-12-14 05:29:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566518299] [2022-12-14 05:29:41,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:41,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:29:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:29:41,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 05:29:41,150 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2022-12-14 05:29:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:42,868 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2022-12-14 05:29:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 05:29:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 45 [2022-12-14 05:29:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:42,869 INFO L225 Difference]: With dead ends: 107 [2022-12-14 05:29:42,869 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 05:29:42,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=756, Invalid=5406, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 05:29:42,874 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 208 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:42,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 237 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:29:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 05:29:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 42. [2022-12-14 05:29:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 05:29:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-14 05:29:42,886 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 45 [2022-12-14 05:29:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:42,886 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-14 05:29:42,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2022-12-14 05:29:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-14 05:29:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 05:29:42,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:42,887 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:42,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:29:43,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 05:29:43,088 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1496344203, now seen corresponding path program 5 times [2022-12-14 05:29:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:43,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683589844] [2022-12-14 05:29:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:43,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 41 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:43,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683589844] [2022-12-14 05:29:43,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683589844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183511056] [2022-12-14 05:29:43,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:29:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:43,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:43,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:29:43,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 05:29:43,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:29:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:29:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:43,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:29:44,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183511056] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:44,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225691750] [2022-12-14 05:29:44,004 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:29:44,004 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:44,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:29:44,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:29:44,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:29:44,040 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:29:44,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:29:44,051 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 [2022-12-14 05:29:44,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:29:44,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:44,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 114 [2022-12-14 05:29:44,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:44,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:44,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:44,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:44,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:44,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:44,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:44,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,438 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:29:44,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 876 treesize of output 899 [2022-12-14 05:29:44,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:44,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 687 treesize of output 670 [2022-12-14 05:29:44,749 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:29:44,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-12-14 05:29:44,758 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 438 treesize of output 396 [2022-12-14 05:29:46,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:46,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:46,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-12-14 05:29:46,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 05:29:46,586 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 30 treesize of output 16 [2022-12-14 05:29:46,612 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 166 treesize of output 124 [2022-12-14 05:29:46,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:46,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:47,662 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:29:47,664 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:29:48,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2405#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:29:48,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:29:48,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:48,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 34 [2022-12-14 05:29:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587984976] [2022-12-14 05:29:48,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:48,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 05:29:48,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 05:29:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 05:29:48,505 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-14 05:29:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:48,743 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2022-12-14 05:29:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:29:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 51 [2022-12-14 05:29:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:48,744 INFO L225 Difference]: With dead ends: 79 [2022-12-14 05:29:48,744 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 05:29:48,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 05:29:48,746 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:48,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 74 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:29:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 05:29:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-12-14 05:29:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 05:29:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-12-14 05:29:48,762 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 51 [2022-12-14 05:29:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:48,762 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-12-14 05:29:48,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-14 05:29:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-12-14 05:29:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 05:29:48,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:48,764 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:48,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:29:48,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:48,966 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1041581268, now seen corresponding path program 6 times [2022-12-14 05:29:48,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:48,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866683321] [2022-12-14 05:29:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:48,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:29:49,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:49,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866683321] [2022-12-14 05:29:49,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866683321] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242498132] [2022-12-14 05:29:49,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:29:49,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:49,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:49,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:49,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:29:49,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:29:49,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:29:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 05:29:49,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:49,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:49,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:49,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:29:49,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-12-14 05:29:49,998 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 41 treesize of output 20 [2022-12-14 05:29:50,010 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 30 treesize of output 16 [2022-12-14 05:29:50,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:50,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-12-14 05:29:50,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-12-14 05:29:50,075 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 27 treesize of output 19 [2022-12-14 05:29:50,092 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 43 treesize of output 27 [2022-12-14 05:29:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:29:50,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:50,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:50,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:29:50,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:50,760 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 40 treesize of output 39 [2022-12-14 05:29:50,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:29:50,777 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 48 treesize of output 43 [2022-12-14 05:29:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:29:50,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242498132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870450056] [2022-12-14 05:29:50,989 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:29:50,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:50,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:29:50,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:29:50,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:29:51,033 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:29:51,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:29:51,043 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 [2022-12-14 05:29:51,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:29:51,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2022-12-14 05:29:51,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:29:51,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:51,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:51,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:51,408 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:29:51,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 884 treesize of output 907 [2022-12-14 05:29:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:51,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:29:51,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 710 [2022-12-14 05:29:51,727 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:29:51,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-12-14 05:29:51,734 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 30 treesize of output 16 [2022-12-14 05:29:53,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:53,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:29:53,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:53,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:29:53,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:53,433 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 24 treesize of output 13 [2022-12-14 05:29:53,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:29:53,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:53,445 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 148 treesize of output 121 [2022-12-14 05:29:53,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:53,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:53,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:53,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:53,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:53,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:54,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:54,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:54,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:54,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:54,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:54,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:29:54,335 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:29:54,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:29:55,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3028#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:29:55,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:29:55,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:55,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-12-14 05:29:55,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104913592] [2022-12-14 05:29:55,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:55,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 05:29:55,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 05:29:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2408, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 05:29:55,556 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 13 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-12-14 05:29:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:59,049 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2022-12-14 05:29:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-14 05:29:59,050 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 13 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) Word has length 64 [2022-12-14 05:29:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:59,051 INFO L225 Difference]: With dead ends: 156 [2022-12-14 05:29:59,051 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 05:29:59,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4167 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1483, Invalid=12323, Unknown=0, NotChecked=0, Total=13806 [2022-12-14 05:29:59,054 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 372 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:59,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 310 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 05:29:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 05:29:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 55. [2022-12-14 05:29:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 05:29:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-14 05:29:59,078 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 64 [2022-12-14 05:29:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:59,078 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-14 05:29:59,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 13 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-12-14 05:29:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-14 05:29:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 05:29:59,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:59,080 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:59,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:29:59,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:59,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:29:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:59,282 INFO L85 PathProgramCache]: Analyzing trace with hash 310299500, now seen corresponding path program 7 times [2022-12-14 05:29:59,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:59,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338468944] [2022-12-14 05:29:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:59,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:29:59,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338468944] [2022-12-14 05:29:59,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338468944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531739594] [2022-12-14 05:29:59,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:29:59,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:59,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:59,764 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:59,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:29:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:59,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 05:29:59,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:59,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-12-14 05:29:59,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 05:30:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:30:00,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:30:00,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:30:00,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:30:00,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:30:00,351 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 40 treesize of output 39 [2022-12-14 05:30:00,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:30:00,361 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 39 treesize of output 34 [2022-12-14 05:30:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:30:00,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531739594] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:30:00,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [964036010] [2022-12-14 05:30:00,537 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:30:00,537 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:30:00,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:30:00,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:30:00,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:30:00,586 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 05:30:00,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 05:30:00,628 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:30:00,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:30:00,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:30:00,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:00,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:00,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-12-14 05:30:00,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:30:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:01,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:01,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:01,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:01,067 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:30:01,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 869 treesize of output 892 [2022-12-14 05:30:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:01,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:01,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:01,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 697 [2022-12-14 05:30:01,420 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:30:01,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 05:30:01,431 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 438 treesize of output 396 [2022-12-14 05:30:03,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:03,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:03,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-12-14 05:30:03,289 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 30 treesize of output 16 [2022-12-14 05:30:03,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-12-14 05:30:03,307 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 166 treesize of output 124 [2022-12-14 05:30:03,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:03,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:03,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:03,838 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 [2022-12-14 05:30:04,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:04,927 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:30:04,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:30:06,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3932#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:30:06,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:30:06,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:30:06,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 38 [2022-12-14 05:30:06,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499338678] [2022-12-14 05:30:06,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:30:06,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 05:30:06,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:30:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 05:30:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 05:30:06,170 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 37 states have internal predecessors, (103), 9 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-12-14 05:30:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:30:11,609 INFO L93 Difference]: Finished difference Result 227 states and 283 transitions. [2022-12-14 05:30:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-14 05:30:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 37 states have internal predecessors, (103), 9 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 70 [2022-12-14 05:30:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:30:11,611 INFO L225 Difference]: With dead ends: 227 [2022-12-14 05:30:11,612 INFO L226 Difference]: Without dead ends: 225 [2022-12-14 05:30:11,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2024, Invalid=20028, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 05:30:11,619 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 509 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:30:11,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 382 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 05:30:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-12-14 05:30:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 58. [2022-12-14 05:30:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 05:30:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-12-14 05:30:11,640 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 70 [2022-12-14 05:30:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:30:11,640 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-12-14 05:30:11,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 37 states have internal predecessors, (103), 9 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-12-14 05:30:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-12-14 05:30:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 05:30:11,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:30:11,641 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:30:11,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:30:11,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:30:11,843 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:30:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:30:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1368209538, now seen corresponding path program 8 times [2022-12-14 05:30:11,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:30:11,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842445159] [2022-12-14 05:30:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:30:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:30:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:30:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 101 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:30:12,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:30:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842445159] [2022-12-14 05:30:12,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842445159] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:30:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683460791] [2022-12-14 05:30:12,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:30:12,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:30:12,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:30:12,324 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:30:12,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:30:13,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 05:30:13,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:30:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:30:13,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:30:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 126 proven. 24 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:30:13,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:30:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 126 proven. 24 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:30:13,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683460791] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:30:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846851811] [2022-12-14 05:30:13,801 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:30:13,801 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:30:13,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:30:13,801 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:30:13,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:30:13,847 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:30:13,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:30:13,859 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 [2022-12-14 05:30:13,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:30:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:13,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:13,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 118 [2022-12-14 05:30:13,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:30:14,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:14,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:14,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:14,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:14,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:14,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:14,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:14,241 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:30:14,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 887 treesize of output 910 [2022-12-14 05:30:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:14,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:14,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 680 treesize of output 663 [2022-12-14 05:30:14,514 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:30:14,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 520 [2022-12-14 05:30:14,520 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 30 treesize of output 16 [2022-12-14 05:30:16,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:16,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:16,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-12-14 05:30:16,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 05:30:16,392 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 30 treesize of output 16 [2022-12-14 05:30:16,408 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 166 treesize of output 124 [2022-12-14 05:30:16,782 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 [2022-12-14 05:30:16,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:16,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:16,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:17,032 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 16 treesize of output 12 [2022-12-14 05:30:17,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:17,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:17,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:17,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:17,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:17,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:17,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:17,446 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:30:17,447 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:30:18,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5029#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:30:18,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:30:18,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:30:18,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 16] total 46 [2022-12-14 05:30:18,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521522966] [2022-12-14 05:30:18,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:30:18,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 05:30:18,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:30:18,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 05:30:18,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2988, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 05:30:18,564 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-12-14 05:30:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:30:18,929 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-12-14 05:30:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 05:30:18,930 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 73 [2022-12-14 05:30:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:30:18,930 INFO L225 Difference]: With dead ends: 104 [2022-12-14 05:30:18,930 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 05:30:18,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=702, Invalid=3720, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 05:30:18,932 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:30:18,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 90 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:30:18,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 05:30:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2022-12-14 05:30:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 05:30:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-12-14 05:30:18,960 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 73 [2022-12-14 05:30:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:30:18,960 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-12-14 05:30:18,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-12-14 05:30:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-12-14 05:30:18,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 05:30:18,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:30:18,962 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:30:18,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:30:19,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 05:30:19,163 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:30:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:30:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash -996268295, now seen corresponding path program 9 times [2022-12-14 05:30:19,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:30:19,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545038589] [2022-12-14 05:30:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:30:19,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:30:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:30:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 05:30:20,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:30:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545038589] [2022-12-14 05:30:20,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545038589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:30:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59321576] [2022-12-14 05:30:20,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:30:20,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:30:20,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:30:20,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:30:20,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:30:20,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:30:20,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:30:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-14 05:30:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:30:20,412 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 16 treesize of output 12 [2022-12-14 05:30:20,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:20,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:30:20,481 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 30 treesize of output 16 [2022-12-14 05:30:20,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-12-14 05:30:20,500 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 41 treesize of output 20 [2022-12-14 05:30:20,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:30:20,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-12-14 05:30:20,583 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 05:30:20,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 50 [2022-12-14 05:30:20,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-12-14 05:30:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 05:30:21,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:30:21,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:30:21,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:30:21,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:30:21,349 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 40 treesize of output 39 [2022-12-14 05:30:21,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:30:21,359 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 48 treesize of output 43 [2022-12-14 05:30:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 05:30:21,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59321576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:30:21,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396768167] [2022-12-14 05:30:21,561 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:30:21,561 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:30:21,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:30:21,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:30:21,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:30:21,603 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:30:21,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:30:21,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 05:30:21,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:30:21,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 92 [2022-12-14 05:30:21,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:30:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:21,997 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:30:21,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 873 treesize of output 896 [2022-12-14 05:30:22,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:22,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:22,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 738 treesize of output 717 [2022-12-14 05:30:22,280 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:30:22,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 05:30:22,320 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 30 treesize of output 16 [2022-12-14 05:30:24,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:30:24,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:30:24,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:24,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:30:24,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:24,280 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 24 treesize of output 13 [2022-12-14 05:30:24,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:30:24,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:24,293 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 148 treesize of output 121 [2022-12-14 05:30:24,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:24,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:24,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:24,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:24,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:24,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:24,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:24,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:25,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:25,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:25,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:25,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:25,271 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:30:25,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:30:26,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5854#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:30:26,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:30:26,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:30:26,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 21] total 48 [2022-12-14 05:30:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294054224] [2022-12-14 05:30:26,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:30:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 05:30:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:30:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 05:30:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3481, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 05:30:26,502 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 16 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 16 states have call predecessors, (36), 16 states have call successors, (36) [2022-12-14 05:30:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:30:33,780 INFO L93 Difference]: Finished difference Result 255 states and 316 transitions. [2022-12-14 05:30:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-12-14 05:30:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 16 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 16 states have call predecessors, (36), 16 states have call successors, (36) Word has length 86 [2022-12-14 05:30:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:30:33,781 INFO L225 Difference]: With dead ends: 255 [2022-12-14 05:30:33,781 INFO L226 Difference]: Without dead ends: 253 [2022-12-14 05:30:33,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10983 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2968, Invalid=30704, Unknown=0, NotChecked=0, Total=33672 [2022-12-14 05:30:33,784 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 465 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 668 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:30:33,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 431 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [668 Valid, 3385 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 05:30:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-12-14 05:30:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 74. [2022-12-14 05:30:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 05:30:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-12-14 05:30:33,812 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 86 [2022-12-14 05:30:33,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:30:33,812 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-12-14 05:30:33,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 16 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 16 states have call predecessors, (36), 16 states have call successors, (36) [2022-12-14 05:30:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-12-14 05:30:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 05:30:33,813 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:30:33,813 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:30:33,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:30:34,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 05:30:34,015 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:30:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:30:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash -112082091, now seen corresponding path program 10 times [2022-12-14 05:30:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:30:34,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920662617] [2022-12-14 05:30:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:30:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:30:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:30:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 05:30:34,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:30:34,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920662617] [2022-12-14 05:30:34,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920662617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:30:34,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382152549] [2022-12-14 05:30:34,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:30:34,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:30:34,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:30:34,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:30:34,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:30:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:30:34,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:30:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:30:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 05:30:35,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:30:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 05:30:35,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382152549] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:30:35,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417184031] [2022-12-14 05:30:35,878 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:30:35,878 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:30:35,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:30:35,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:30:35,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:30:35,917 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 05:30:35,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 05:30:35,944 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:30:35,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:30:36,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:30:36,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2022-12-14 05:30:36,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:30:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:36,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:36,334 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:30:36,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 884 treesize of output 907 [2022-12-14 05:30:36,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:30:36,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:30:36,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 710 [2022-12-14 05:30:36,546 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:30:36,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 05:30:36,587 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 30 treesize of output 16 [2022-12-14 05:30:38,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:38,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:38,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-12-14 05:30:38,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 05:30:38,619 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 30 treesize of output 16 [2022-12-14 05:30:38,646 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 166 treesize of output 124 [2022-12-14 05:30:39,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:30:39,703 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:30:39,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:30:40,772 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7207#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:30:40,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:30:40,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:30:40,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20] total 58 [2022-12-14 05:30:40,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609050326] [2022-12-14 05:30:40,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:30:40,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 05:30:40,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:30:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 05:30:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=4273, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 05:30:40,774 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-12-14 05:30:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:30:41,191 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2022-12-14 05:30:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 05:30:41,191 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 95 [2022-12-14 05:30:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:30:41,192 INFO L225 Difference]: With dead ends: 129 [2022-12-14 05:30:41,192 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 05:30:41,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1040, Invalid=5280, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 05:30:41,194 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:30:41,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 135 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:30:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 05:30:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2022-12-14 05:30:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 05:30:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-12-14 05:30:41,234 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 95 [2022-12-14 05:30:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:30:41,234 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-12-14 05:30:41,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-12-14 05:30:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-12-14 05:30:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 05:30:41,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:30:41,235 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 05:30:41,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 05:30:41,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 05:30:41,437 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:30:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:30:41,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1508535948, now seen corresponding path program 11 times [2022-12-14 05:30:41,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:30:41,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012582867] [2022-12-14 05:30:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:30:41,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:30:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:30:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:30:42,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:30:42,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012582867] [2022-12-14 05:30:42,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012582867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:30:42,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222829887] [2022-12-14 05:30:42,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:30:42,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:30:42,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:30:42,504 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:30:42,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:30:44,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 05:30:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:30:44,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 05:30:44,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:30:44,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 05:30:44,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:30:44,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 05:30:44,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:30:46,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:30:46,495 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 05:30:46,498 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 31 treesize of output 17 [2022-12-14 05:30:48,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 05:30:48,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-12-14 05:30:48,620 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 22 treesize of output 14 [2022-12-14 05:30:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 52 proven. 297 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-12-14 05:30:49,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:31:21,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:31:21,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:31:21,889 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 11 treesize of output 4 [2022-12-14 05:31:21,895 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 05:31:21,895 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 19 treesize of output 13 [2022-12-14 05:31:21,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:31:21,900 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 30 treesize of output 25 [2022-12-14 05:31:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:31:22,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222829887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:31:22,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133764591] [2022-12-14 05:31:22,167 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:31:22,167 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:31:22,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:31:22,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:31:22,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:31:22,209 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:31:22,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:31:22,220 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 [2022-12-14 05:31:22,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:31:22,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2022-12-14 05:31:22,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:31:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:31:22,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:31:22,642 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:31:22,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 906 treesize of output 929 [2022-12-14 05:31:22,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:22,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:31:22,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 717 treesize of output 696 [2022-12-14 05:31:22,821 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:31:22,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-12-14 05:31:22,833 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 438 treesize of output 396 [2022-12-14 05:31:24,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:31:24,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:31:24,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:24,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:31:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:24,866 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 24 treesize of output 13 [2022-12-14 05:31:24,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:31:24,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:31:24,879 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 148 treesize of output 121 [2022-12-14 05:31:25,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:31:25,780 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:31:25,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:31:31,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8244#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:31:31,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:31:31,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:31:31,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 68 [2022-12-14 05:31:31,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092965079] [2022-12-14 05:31:31,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:31:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 05:31:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:31:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 05:31:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=6266, Unknown=17, NotChecked=0, Total=6642 [2022-12-14 05:31:31,276 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 68 states, 68 states have (on average 2.735294117647059) internal successors, (186), 68 states have internal predecessors, (186), 18 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2022-12-14 05:31:37,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:31:39,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:32:00,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:32:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:00,416 INFO L93 Difference]: Finished difference Result 377 states and 454 transitions. [2022-12-14 05:32:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-12-14 05:32:00,417 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.735294117647059) internal successors, (186), 68 states have internal predecessors, (186), 18 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) Word has length 108 [2022-12-14 05:32:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:00,418 INFO L225 Difference]: With dead ends: 377 [2022-12-14 05:32:00,418 INFO L226 Difference]: Without dead ends: 375 [2022-12-14 05:32:00,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 261 SyntacticMatches, 8 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21516 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=4916, Invalid=64497, Unknown=19, NotChecked=0, Total=69432 [2022-12-14 05:32:00,423 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 765 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 6977 mSolverCounterSat, 1500 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 8480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1500 IncrementalHoareTripleChecker+Valid, 6977 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:00,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 722 Invalid, 8480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1500 Valid, 6977 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2022-12-14 05:32:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-12-14 05:32:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 185. [2022-12-14 05:32:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 124 states have (on average 1.1290322580645162) internal successors, (140), 125 states have internal predecessors, (140), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:32:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 256 transitions. [2022-12-14 05:32:00,552 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 256 transitions. Word has length 108 [2022-12-14 05:32:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:00,552 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 256 transitions. [2022-12-14 05:32:00,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.735294117647059) internal successors, (186), 68 states have internal predecessors, (186), 18 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2022-12-14 05:32:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 256 transitions. [2022-12-14 05:32:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 05:32:00,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:00,553 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:00,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:32:00,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:00,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:00,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:00,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1737932446, now seen corresponding path program 12 times [2022-12-14 05:32:00,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:00,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145382996] [2022-12-14 05:32:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:00,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:32:01,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:01,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145382996] [2022-12-14 05:32:01,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145382996] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:32:01,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557825672] [2022-12-14 05:32:01,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:32:01,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:01,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:01,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:32:01,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:32:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:32:01,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 05:32:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:02,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-12-14 05:32:02,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 05:32:02,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:32:02,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:32:02,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 05:32:02,240 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 05:32:02,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-12-14 05:32:02,245 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 22 treesize of output 14 [2022-12-14 05:32:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:32:03,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:03,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:32:03,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:32:03,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:32:03,875 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 40 treesize of output 39 [2022-12-14 05:32:03,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:32:03,896 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 44 treesize of output 39 [2022-12-14 05:32:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:32:04,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557825672] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:04,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756356610] [2022-12-14 05:32:04,336 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:32:04,336 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:04,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:04,336 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:04,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:04,382 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 05:32:04,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 05:32:04,424 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:32:04,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:32:04,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:32:04,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 110 [2022-12-14 05:32:04,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:32:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:32:04,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:32:04,863 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:32:04,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 865 treesize of output 888 [2022-12-14 05:32:04,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:04,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 694 treesize of output 677 [2022-12-14 05:32:05,050 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:32:05,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-12-14 05:32:05,061 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 438 treesize of output 396 [2022-12-14 05:32:07,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:32:07,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:32:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:07,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:32:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:07,252 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 24 treesize of output 13 [2022-12-14 05:32:07,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:32:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:07,275 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 148 treesize of output 121 [2022-12-14 05:32:07,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:07,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:07,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:07,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:07,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:07,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:07,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:07,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:08,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:08,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:08,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:08,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:08,235 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:32:08,236 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:32:09,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10174#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:32:09,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:32:09,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:32:09,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 71 [2022-12-14 05:32:09,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937633462] [2022-12-14 05:32:09,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:32:09,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 05:32:09,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:09,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 05:32:09,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=6767, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 05:32:09,922 INFO L87 Difference]: Start difference. First operand 185 states and 256 transitions. Second operand has 71 states, 71 states have (on average 2.7464788732394365) internal successors, (195), 70 states have internal predecessors, (195), 19 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2022-12-14 05:32:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:26,961 INFO L93 Difference]: Finished difference Result 428 states and 509 transitions. [2022-12-14 05:32:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-12-14 05:32:26,961 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.7464788732394365) internal successors, (195), 70 states have internal predecessors, (195), 19 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) Word has length 111 [2022-12-14 05:32:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:26,963 INFO L225 Difference]: With dead ends: 428 [2022-12-14 05:32:26,963 INFO L226 Difference]: Without dead ends: 426 [2022-12-14 05:32:26,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28753 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=6390, Invalid=79166, Unknown=0, NotChecked=0, Total=85556 [2022-12-14 05:32:26,969 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1118 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 6899 mSolverCounterSat, 1991 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 8890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1991 IncrementalHoareTripleChecker+Valid, 6899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:26,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 674 Invalid, 8890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1991 Valid, 6899 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 05:32:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-12-14 05:32:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 188. [2022-12-14 05:32:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 127 states have (on average 1.125984251968504) internal successors, (143), 128 states have internal predecessors, (143), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:32:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 259 transitions. [2022-12-14 05:32:27,111 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 259 transitions. Word has length 111 [2022-12-14 05:32:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:27,111 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 259 transitions. [2022-12-14 05:32:27,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.7464788732394365) internal successors, (195), 70 states have internal predecessors, (195), 19 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2022-12-14 05:32:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 259 transitions. [2022-12-14 05:32:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 05:32:27,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:27,112 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:27,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:32:27,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 05:32:27,314 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:27,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1090680524, now seen corresponding path program 13 times [2022-12-14 05:32:27,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:27,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017675832] [2022-12-14 05:32:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:27,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:32:28,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017675832] [2022-12-14 05:32:28,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017675832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:32:28,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952677089] [2022-12-14 05:32:28,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:32:28,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:28,053 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:28,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:32:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:28,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 05:32:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:28,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-12-14 05:32:28,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-12-14 05:32:28,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 05:32:28,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 05:32:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:32:29,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:29,320 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:32:29,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:32:29,335 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 11 treesize of output 4 [2022-12-14 05:32:29,343 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 05:32:29,343 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 19 treesize of output 13 [2022-12-14 05:32:29,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:32:29,350 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 30 treesize of output 25 [2022-12-14 05:32:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:32:29,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952677089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:29,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [773329369] [2022-12-14 05:32:29,632 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:32:29,632 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:29,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:29,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:29,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:29,669 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 05:32:29,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 05:32:29,700 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:32:29,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:32:29,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:32:29,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:29,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 123 [2022-12-14 05:32:29,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:32:30,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:30,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:30,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:30,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:30,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:30,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:30,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:32:30,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:32:30,113 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:32:30,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 872 treesize of output 895 [2022-12-14 05:32:30,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:30,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:32:30,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 665 treesize of output 650 [2022-12-14 05:32:30,342 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:32:30,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 05:32:30,360 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 438 treesize of output 396 [2022-12-14 05:32:32,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:32,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:32,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-12-14 05:32:32,484 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 30 treesize of output 16 [2022-12-14 05:32:32,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-12-14 05:32:32,506 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 166 treesize of output 124 [2022-12-14 05:32:32,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:32,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:33,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:34,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:34,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:32:34,120 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:32:34,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:32:35,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12231#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:32:35,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:32:35,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:32:35,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 55 [2022-12-14 05:32:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688775825] [2022-12-14 05:32:35,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:32:35,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 05:32:35,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:35,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 05:32:35,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4433, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 05:32:35,452 INFO L87 Difference]: Start difference. First operand 188 states and 259 transitions. Second operand has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 55 states have internal predecessors, (163), 15 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-12-14 05:32:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:54,567 INFO L93 Difference]: Finished difference Result 488 states and 577 transitions. [2022-12-14 05:32:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-12-14 05:32:54,568 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 55 states have internal predecessors, (163), 15 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) Word has length 114 [2022-12-14 05:32:54,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:54,569 INFO L225 Difference]: With dead ends: 488 [2022-12-14 05:32:54,569 INFO L226 Difference]: Without dead ends: 486 [2022-12-14 05:32:54,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34280 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=5837, Invalid=89335, Unknown=0, NotChecked=0, Total=95172 [2022-12-14 05:32:54,573 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 897 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 5776 mSolverCounterSat, 1635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 7411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1635 IncrementalHoareTripleChecker+Valid, 5776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:54,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 812 Invalid, 7411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1635 Valid, 5776 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 05:32:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-12-14 05:32:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 191. [2022-12-14 05:32:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 130 states have (on average 1.123076923076923) internal successors, (146), 131 states have internal predecessors, (146), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:32:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 262 transitions. [2022-12-14 05:32:54,710 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 262 transitions. Word has length 114 [2022-12-14 05:32:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:54,711 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 262 transitions. [2022-12-14 05:32:54,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 55 states have internal predecessors, (163), 15 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-12-14 05:32:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 262 transitions. [2022-12-14 05:32:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 05:32:54,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:54,712 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:54,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 05:32:54,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:32:54,914 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1041322274, now seen corresponding path program 14 times [2022-12-14 05:32:54,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:54,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094476068] [2022-12-14 05:32:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:54,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 302 proven. 118 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:32:55,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:55,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094476068] [2022-12-14 05:32:55,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094476068] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:32:55,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497153398] [2022-12-14 05:32:55,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:32:55,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:55,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:55,585 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:55,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:32:58,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 05:32:58,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:32:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:32:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 345 proven. 75 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:32:59,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 345 proven. 75 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 05:33:00,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497153398] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:00,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215561472] [2022-12-14 05:33:00,197 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:33:00,197 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:33:00,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:33:00,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:33:00,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:33:00,229 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:33:00,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:33:00,239 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 [2022-12-14 05:33:00,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:33:00,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2022-12-14 05:33:00,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:33:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:00,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:00,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:00,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:00,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:00,680 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:33:00,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 854 treesize of output 877 [2022-12-14 05:33:00,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:00,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:00,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 701 treesize of output 684 [2022-12-14 05:33:00,993 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:33:00,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-12-14 05:33:01,042 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 30 treesize of output 16 [2022-12-14 05:33:02,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:33:02,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:33:02,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:02,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:33:03,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:03,013 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 24 treesize of output 13 [2022-12-14 05:33:03,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:33:03,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:03,036 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 148 treesize of output 121 [2022-12-14 05:33:03,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:03,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:04,051 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:33:04,052 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:33:05,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14474#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:33:05,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:33:05,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:33:05,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 24] total 71 [2022-12-14 05:33:05,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835916615] [2022-12-14 05:33:05,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:33:05,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 05:33:05,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:33:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 05:33:05,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=5909, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 05:33:05,515 INFO L87 Difference]: Start difference. First operand 191 states and 262 transitions. Second operand has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 15 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-12-14 05:33:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:06,212 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2022-12-14 05:33:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 05:33:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 15 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) Word has length 117 [2022-12-14 05:33:06,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:06,215 INFO L225 Difference]: With dead ends: 242 [2022-12-14 05:33:06,216 INFO L226 Difference]: Without dead ends: 191 [2022-12-14 05:33:06,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1499, Invalid=7243, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 05:33:06,216 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:06,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 149 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:33:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-14 05:33:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-12-14 05:33:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 131 states have internal predecessors, (145), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:33:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 261 transitions. [2022-12-14 05:33:06,353 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 261 transitions. Word has length 117 [2022-12-14 05:33:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:06,353 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 261 transitions. [2022-12-14 05:33:06,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 15 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-12-14 05:33:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 261 transitions. [2022-12-14 05:33:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 05:33:06,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:06,354 INFO L195 NwaCegarLoop]: trace histogram [18, 16, 15, 15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 05:33:06,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:33:06,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:33:06,556 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:33:06,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1364219623, now seen corresponding path program 15 times [2022-12-14 05:33:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:33:06,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220276426] [2022-12-14 05:33:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:33:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-12-14 05:33:07,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:33:07,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220276426] [2022-12-14 05:33:07,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220276426] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:33:07,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825282440] [2022-12-14 05:33:07,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:33:07,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:07,806 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:07,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:33:07,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:33:07,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:33:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 05:33:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:08,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:08,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-12-14 05:33:08,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:33:08,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 05:33:08,413 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 30 treesize of output 16 [2022-12-14 05:33:08,419 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 41 treesize of output 20 [2022-12-14 05:33:08,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:33:08,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-12-14 05:33:08,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-12-14 05:33:08,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 50 [2022-12-14 05:33:08,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-12-14 05:33:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-12-14 05:33:09,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:10,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:33:10,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:33:10,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 40 [2022-12-14 05:33:10,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:33:10,115 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 40 treesize of output 39 [2022-12-14 05:33:10,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:33:10,124 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 39 treesize of output 34 [2022-12-14 05:33:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-12-14 05:33:10,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825282440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:10,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144501761] [2022-12-14 05:33:10,459 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:33:10,459 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:33:10,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:33:10,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:33:10,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:33:10,499 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:33:10,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:33:10,509 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 [2022-12-14 05:33:10,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:33:10,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 110 [2022-12-14 05:33:10,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:33:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:10,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:10,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:10,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:10,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:10,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:10,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:10,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:10,924 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:33:10,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 865 treesize of output 888 [2022-12-14 05:33:10,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:10,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:10,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 694 treesize of output 677 [2022-12-14 05:33:11,219 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:33:11,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-12-14 05:33:11,253 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 30 treesize of output 16 [2022-12-14 05:33:13,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:33:13,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:33:13,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:13,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:33:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:13,252 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 24 treesize of output 13 [2022-12-14 05:33:13,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:33:13,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:13,264 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 148 treesize of output 121 [2022-12-14 05:33:13,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:13,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:13,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:13,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:13,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:13,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:13,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:13,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:14,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:14,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:14,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:14,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:14,273 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:33:14,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:33:15,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15986#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:33:15,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:33:15,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:33:15,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 64 [2022-12-14 05:33:15,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080465599] [2022-12-14 05:33:15,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:33:15,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 05:33:15,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:33:15,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 05:33:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=5659, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 05:33:15,798 INFO L87 Difference]: Start difference. First operand 191 states and 261 transitions. Second operand has 64 states, 64 states have (on average 2.828125) internal successors, (181), 63 states have internal predecessors, (181), 22 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 22 states have call predecessors, (54), 22 states have call successors, (54) [2022-12-14 05:33:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:40,740 INFO L93 Difference]: Finished difference Result 528 states and 622 transitions. [2022-12-14 05:33:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-12-14 05:33:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.828125) internal successors, (181), 63 states have internal predecessors, (181), 22 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 22 states have call predecessors, (54), 22 states have call successors, (54) Word has length 130 [2022-12-14 05:33:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:40,742 INFO L225 Difference]: With dead ends: 528 [2022-12-14 05:33:40,742 INFO L226 Difference]: Without dead ends: 526 [2022-12-14 05:33:40,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41694 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=6959, Invalid=108301, Unknown=0, NotChecked=0, Total=115260 [2022-12-14 05:33:40,749 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 929 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 7279 mSolverCounterSat, 1587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 8866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1587 IncrementalHoareTripleChecker+Valid, 7279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:40,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 982 Invalid, 8866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1587 Valid, 7279 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-12-14 05:33:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-12-14 05:33:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 200. [2022-12-14 05:33:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 139 states have (on average 1.1079136690647482) internal successors, (154), 140 states have internal predecessors, (154), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:33:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2022-12-14 05:33:40,921 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 130 [2022-12-14 05:33:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:40,922 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2022-12-14 05:33:40,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.828125) internal successors, (181), 63 states have internal predecessors, (181), 22 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 22 states have call predecessors, (54), 22 states have call successors, (54) [2022-12-14 05:33:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2022-12-14 05:33:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 05:33:40,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:40,923 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 05:33:40,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:33:41,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:33:41,125 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:33:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:41,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1493129931, now seen corresponding path program 16 times [2022-12-14 05:33:41,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:33:41,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029641768] [2022-12-14 05:33:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:41,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:33:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 443 proven. 163 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-12-14 05:33:42,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:33:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029641768] [2022-12-14 05:33:42,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029641768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:33:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42149959] [2022-12-14 05:33:42,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:33:42,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:42,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:42,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:42,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:33:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:42,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 05:33:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 495 proven. 111 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-12-14 05:33:43,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 495 proven. 111 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-12-14 05:33:43,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42149959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469986068] [2022-12-14 05:33:43,826 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:33:43,826 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:33:43,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:33:43,826 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:33:43,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:33:43,883 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:33:43,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:33:43,891 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 [2022-12-14 05:33:43,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:33:43,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 105 [2022-12-14 05:33:44,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:33:44,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:44,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:44,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:44,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:44,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:44,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:44,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:44,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:44,266 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:33:44,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 880 treesize of output 903 [2022-12-14 05:33:44,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:33:44,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:33:44,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 709 treesize of output 690 [2022-12-14 05:33:44,540 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:33:44,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-12-14 05:33:44,574 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 30 treesize of output 16 [2022-12-14 05:33:46,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:46,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:46,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-12-14 05:33:46,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 05:33:46,396 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 30 treesize of output 16 [2022-12-14 05:33:46,418 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 166 treesize of output 124 [2022-12-14 05:33:46,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:46,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:46,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:46,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:33:47,548 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:33:47,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:33:48,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18484#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:33:48,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:33:48,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:33:48,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 28] total 83 [2022-12-14 05:33:48,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852735849] [2022-12-14 05:33:48,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:33:48,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 05:33:48,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:33:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 05:33:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1654, Invalid=7658, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 05:33:48,863 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 83 states have internal predecessors, (251), 18 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 18 states have call predecessors, (54), 18 states have call successors, (54) [2022-12-14 05:33:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:49,678 INFO L93 Difference]: Finished difference Result 260 states and 330 transitions. [2022-12-14 05:33:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 05:33:49,679 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 83 states have internal predecessors, (251), 18 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 18 states have call predecessors, (54), 18 states have call successors, (54) Word has length 139 [2022-12-14 05:33:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:49,680 INFO L225 Difference]: With dead ends: 260 [2022-12-14 05:33:49,680 INFO L226 Difference]: Without dead ends: 200 [2022-12-14 05:33:49,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1988, Invalid=9354, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 05:33:49,681 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:49,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 241 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:33:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-14 05:33:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-12-14 05:33:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 139 states have (on average 1.1007194244604317) internal successors, (153), 140 states have internal predecessors, (153), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:33:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 269 transitions. [2022-12-14 05:33:49,827 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 269 transitions. Word has length 139 [2022-12-14 05:33:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:49,827 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 269 transitions. [2022-12-14 05:33:49,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 83 states have internal predecessors, (251), 18 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 18 states have call predecessors, (54), 18 states have call successors, (54) [2022-12-14 05:33:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 269 transitions. [2022-12-14 05:33:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 05:33:49,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:49,828 INFO L195 NwaCegarLoop]: trace histogram [21, 19, 18, 18, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 05:33:49,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 05:33:50,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:33:50,030 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:33:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash 504273388, now seen corresponding path program 17 times [2022-12-14 05:33:50,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:33:50,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734626912] [2022-12-14 05:33:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:50,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:33:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:33:51,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:33:51,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734626912] [2022-12-14 05:33:51,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734626912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:33:51,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871445173] [2022-12-14 05:33:51,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:33:51,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:51,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:51,542 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:51,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:34:34,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-14 05:34:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:34:34,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 05:34:34,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:35,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:34:35,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:09,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:35:09,260 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 19 treesize of output 12 [2022-12-14 05:35:09,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-12-14 05:35:09,267 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 31 treesize of output 17 [2022-12-14 05:35:41,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 05:35:41,553 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 13 treesize of output 9 [2022-12-14 05:35:41,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-12-14 05:35:41,562 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 22 treesize of output 14 [2022-12-14 05:35:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 76 proven. 649 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-12-14 05:35:42,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:46,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:35:46,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:35:46,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-12-14 05:35:46,933 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 11 treesize of output 4 [2022-12-14 05:35:46,940 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 05:35:46,940 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 19 treesize of output 13 [2022-12-14 05:35:46,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:35:46,947 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 30 treesize of output 25 [2022-12-14 05:35:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:35:47,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871445173] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:47,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761007487] [2022-12-14 05:35:47,400 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:35:47,401 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:35:47,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:35:47,401 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:35:47,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:35:47,447 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:35:47,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:35:47,459 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 [2022-12-14 05:35:47,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:35:47,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 109 [2022-12-14 05:35:47,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:35:47,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:35:47,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:35:47,889 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:35:47,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 891 treesize of output 914 [2022-12-14 05:35:47,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:47,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:35:47,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 702 treesize of output 683 [2022-12-14 05:35:48,175 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:35:48,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-12-14 05:35:48,185 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 30 treesize of output 16 [2022-12-14 05:35:50,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:35:50,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:35:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:50,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:35:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:50,320 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 24 treesize of output 13 [2022-12-14 05:35:50,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:35:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:35:50,333 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 148 treesize of output 121 [2022-12-14 05:35:50,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:50,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:50,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:50,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:50,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:50,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:50,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:50,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:51,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:51,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:51,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:51,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:35:51,364 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:35:51,366 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:35:57,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20175#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:35:57,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:35:57,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:35:57,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 32] total 73 [2022-12-14 05:35:57,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436260095] [2022-12-14 05:35:57,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:57,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 05:35:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:35:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 05:35:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=7066, Unknown=21, NotChecked=0, Total=7482 [2022-12-14 05:35:57,246 INFO L87 Difference]: Start difference. First operand 200 states and 269 transitions. Second operand has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 24 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 24 states have call predecessors, (63), 24 states have call successors, (63) [2022-12-14 05:37:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:37:04,782 INFO L93 Difference]: Finished difference Result 697 states and 808 transitions. [2022-12-14 05:37:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 386 states. [2022-12-14 05:37:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 24 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 24 states have call predecessors, (63), 24 states have call successors, (63) Word has length 152 [2022-12-14 05:37:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:37:04,787 INFO L225 Difference]: With dead ends: 697 [2022-12-14 05:37:04,787 INFO L226 Difference]: Without dead ends: 695 [2022-12-14 05:37:04,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 396 SyntacticMatches, 6 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87180 ImplicationChecksByTransitivity, 137.3s TimeCoverageRelationStatistics Valid=11037, Invalid=209370, Unknown=23, NotChecked=0, Total=220430 [2022-12-14 05:37:04,796 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 930 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 10745 mSolverCounterSat, 2301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 13046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2301 IncrementalHoareTripleChecker+Valid, 10745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:37:04,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1020 Invalid, 13046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2301 Valid, 10745 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-12-14 05:37:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-12-14 05:37:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 203. [2022-12-14 05:37:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 142 states have (on average 1.0985915492957747) internal successors, (156), 143 states have internal predecessors, (156), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:37:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 272 transitions. [2022-12-14 05:37:05,065 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 272 transitions. Word has length 152 [2022-12-14 05:37:05,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:37:05,066 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 272 transitions. [2022-12-14 05:37:05,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 24 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 24 states have call predecessors, (63), 24 states have call successors, (63) [2022-12-14 05:37:05,066 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 272 transitions. [2022-12-14 05:37:05,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 05:37:05,067 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:37:05,067 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 05:37:05,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 05:37:05,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:37:05,268 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:37:05,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:37:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash -981673470, now seen corresponding path program 18 times [2022-12-14 05:37:05,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:37:05,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765516634] [2022-12-14 05:37:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:37:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:37:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:37:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:37:06,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:37:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765516634] [2022-12-14 05:37:06,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765516634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:37:06,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103619216] [2022-12-14 05:37:06,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:37:06,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:37:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:37:06,683 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:37:06,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 05:37:06,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:37:06,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:37:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-14 05:37:06,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:37:07,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:07,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-12-14 05:37:07,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-12-14 05:37:07,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-12-14 05:37:07,381 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 21 treesize of output 13 [2022-12-14 05:37:07,393 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 29 treesize of output 17 [2022-12-14 05:37:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:37:08,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:37:08,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:37:08,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-12-14 05:37:08,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 40 [2022-12-14 05:37:08,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:37:08,809 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 40 treesize of output 39 [2022-12-14 05:37:08,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:37:08,819 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 50 treesize of output 39 [2022-12-14 05:37:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:37:09,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103619216] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:37:09,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418804800] [2022-12-14 05:37:09,332 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:37:09,333 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:37:09,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:37:09,333 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:37:09,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:37:09,372 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:37:09,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:37:09,382 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 [2022-12-14 05:37:09,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:37:09,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-12-14 05:37:09,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:37:09,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:37:09,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:37:09,786 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:37:09,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 914 treesize of output 937 [2022-12-14 05:37:09,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:09,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:37:09,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 761 treesize of output 736 [2022-12-14 05:37:09,960 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:37:09,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-12-14 05:37:10,014 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 30 treesize of output 16 [2022-12-14 05:37:11,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:37:11,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 05:37:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:11,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-12-14 05:37:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:11,896 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 24 treesize of output 13 [2022-12-14 05:37:11,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-12-14 05:37:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:37:11,910 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 148 treesize of output 121 [2022-12-14 05:37:12,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:12,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:37:13,436 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:37:13,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:37:15,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23243#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:37:15,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:37:15,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:37:15,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 76 [2022-12-14 05:37:15,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498791357] [2022-12-14 05:37:15,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:37:15,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 05:37:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:37:15,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 05:37:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=7611, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 05:37:15,261 INFO L87 Difference]: Start difference. First operand 203 states and 272 transitions. Second operand has 76 states, 76 states have (on average 2.8815789473684212) internal successors, (219), 75 states have internal predecessors, (219), 24 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 25 states have call predecessors, (63), 24 states have call successors, (63) [2022-12-14 05:37:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:37:59,918 INFO L93 Difference]: Finished difference Result 768 states and 884 transitions. [2022-12-14 05:37:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 430 states. [2022-12-14 05:37:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.8815789473684212) internal successors, (219), 75 states have internal predecessors, (219), 24 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 25 states have call predecessors, (63), 24 states have call successors, (63) Word has length 155 [2022-12-14 05:37:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:37:59,920 INFO L225 Difference]: With dead ends: 768 [2022-12-14 05:37:59,920 INFO L226 Difference]: Without dead ends: 766 [2022-12-14 05:37:59,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105530 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=12728, Invalid=255078, Unknown=0, NotChecked=0, Total=267806 [2022-12-14 05:37:59,931 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 1447 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 10620 mSolverCounterSat, 2650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 13270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2650 IncrementalHoareTripleChecker+Valid, 10620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:37:59,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1447 Valid, 1315 Invalid, 13270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2650 Valid, 10620 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-12-14 05:37:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-12-14 05:38:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 209. [2022-12-14 05:38:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 148 states have (on average 1.0945945945945945) internal successors, (162), 149 states have internal predecessors, (162), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:38:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 278 transitions. [2022-12-14 05:38:00,098 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 278 transitions. Word has length 155 [2022-12-14 05:38:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:00,098 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 278 transitions. [2022-12-14 05:38:00,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.8815789473684212) internal successors, (219), 75 states have internal predecessors, (219), 24 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 25 states have call predecessors, (63), 24 states have call successors, (63) [2022-12-14 05:38:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 278 transitions. [2022-12-14 05:38:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 05:38:00,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:00,099 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 05:38:00,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 05:38:00,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:38:00,301 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash -738725438, now seen corresponding path program 19 times [2022-12-14 05:38:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:00,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197148668] [2022-12-14 05:38:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 611 proven. 215 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:38:01,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:01,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197148668] [2022-12-14 05:38:01,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197148668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:38:01,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433585062] [2022-12-14 05:38:01,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:38:01,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:38:01,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:38:01,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:38:01,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 05:38:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:01,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 05:38:01,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:38:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 672 proven. 154 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:38:03,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:38:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 672 proven. 154 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:38:03,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433585062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:38:03,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221124923] [2022-12-14 05:38:03,936 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:38:03,936 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:38:03,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:38:03,937 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:38:03,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:38:03,980 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-12-14 05:38:03,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-12-14 05:38:04,023 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 05:38:04,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-12-14 05:38:04,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-12-14 05:38:04,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 120 [2022-12-14 05:38:04,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 05:38:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:38:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:38:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:38:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:38:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:38:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:38:04,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:38:04,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:38:04,443 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-12-14 05:38:04,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 835 treesize of output 858 [2022-12-14 05:38:04,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:38:04,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 664 treesize of output 651 [2022-12-14 05:38:04,636 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 05:38:04,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-12-14 05:38:04,682 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 30 treesize of output 16 [2022-12-14 05:38:06,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:06,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:06,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-12-14 05:38:06,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 05:38:06,658 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 30 treesize of output 16 [2022-12-14 05:38:06,671 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 166 treesize of output 124 [2022-12-14 05:38:07,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:38:07,720 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-12-14 05:38:07,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:38:09,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26561#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 05:38:09,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:38:09,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:38:09,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 32] total 95 [2022-12-14 05:38:09,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299678177] [2022-12-14 05:38:09,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:38:09,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-12-14 05:38:09,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:38:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-12-14 05:38:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2143, Invalid=9629, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 05:38:09,180 INFO L87 Difference]: Start difference. First operand 209 states and 278 transitions. Second operand has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 21 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 21 states have call predecessors, (63), 21 states have call successors, (63) [2022-12-14 05:38:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:38:10,298 INFO L93 Difference]: Finished difference Result 278 states and 347 transitions. [2022-12-14 05:38:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 05:38:10,299 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 21 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 21 states have call predecessors, (63), 21 states have call successors, (63) Word has length 161 [2022-12-14 05:38:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:38:10,300 INFO L225 Difference]: With dead ends: 278 [2022-12-14 05:38:10,300 INFO L226 Difference]: Without dead ends: 209 [2022-12-14 05:38:10,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6236 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2550, Invalid=11730, Unknown=0, NotChecked=0, Total=14280 [2022-12-14 05:38:10,301 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:38:10,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 247 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:38:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-12-14 05:38:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-12-14 05:38:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 148 states have (on average 1.087837837837838) internal successors, (161), 149 states have internal predecessors, (161), 58 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:38:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 277 transitions. [2022-12-14 05:38:10,466 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 277 transitions. Word has length 161 [2022-12-14 05:38:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:38:10,467 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 277 transitions. [2022-12-14 05:38:10,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 21 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 21 states have call predecessors, (63), 21 states have call successors, (63) [2022-12-14 05:38:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 277 transitions. [2022-12-14 05:38:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 05:38:10,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:38:10,468 INFO L195 NwaCegarLoop]: trace histogram [24, 22, 21, 21, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 05:38:10,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 05:38:10,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 05:38:10,669 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:38:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:38:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash 583758649, now seen corresponding path program 20 times [2022-12-14 05:38:10,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:38:10,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449389657] [2022-12-14 05:38:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:38:10,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:38:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:38:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-12-14 05:38:12,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:38:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449389657] [2022-12-14 05:38:12,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449389657] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:38:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446465870] [2022-12-14 05:38:12,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:38:12,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:38:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:38:12,422 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:38:12,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d28b562-4ef4-488c-b063-845a82410265/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 05:42:10,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-12-14 05:42:10,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:42:10,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 05:42:10,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:42:10,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 05:42:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:42:10,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-12-14 05:42:50,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-12-14 05:42:50,920 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 31 treesize of output 17 [2022-12-14 05:42:50,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 05:42:50,935 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 30 treesize of output 16