./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/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_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/nr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/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_f4d30895-7020-433a-83fe-3d67ff1d47df/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 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 --- 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 13:48:26,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:48:26,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:48:26,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:48:26,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:48:26,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:48:26,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:48:26,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:48:26,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:48:26,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:48:26,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:48:26,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:48:26,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:48:26,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:48:26,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:48:26,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:48:26,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:48:26,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:48:26,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:48:26,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:48:26,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:48:26,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:48:26,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:48:26,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:48:26,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:48:26,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:48:26,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:48:26,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:48:26,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:48:26,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:48:26,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:48:26,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:48:26,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:48:26,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:48:26,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:48:26,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:48:26,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:48:26,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:48:26,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:48:26,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:48:26,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:48:26,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:48:26,694 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:48:26,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:48:26,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:48:26,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:48:26,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:48:26,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:48:26,696 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:48:26,696 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:48:26,696 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:48:26,697 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:48:26,697 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:48:26,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:48:26,697 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:48:26,697 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:48:26,697 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:48:26,698 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:48:26,698 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:48:26,698 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:48:26,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:48:26,699 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:48:26,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:48:26,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:48:26,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:48:26,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:48:26,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:48:26,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:48:26,700 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:48:26,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:48:26,701 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:48:26,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:48:26,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:48:26,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:48:26,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:48:26,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:48:26,702 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:48:26,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:48:26,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:48:26,702 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:48:26,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:48:26,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:48:26,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:48:26,703 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_f4d30895-7020-433a-83fe-3d67ff1d47df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 [2022-12-14 13:48:26,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:48:26,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:48:26,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:48:26,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:48:26,944 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:48:26,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-tiling/nr2.c [2022-12-14 13:48:29,536 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:48:29,685 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:48:29,686 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/sv-benchmarks/c/array-tiling/nr2.c [2022-12-14 13:48:29,691 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/data/f170c8583/258aa299b8d7466384bea0368bcc1301/FLAG27bc52348 [2022-12-14 13:48:29,702 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/data/f170c8583/258aa299b8d7466384bea0368bcc1301 [2022-12-14 13:48:29,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:48:29,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:48:29,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:48:29,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:48:29,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:48:29,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60bff647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29, skipping insertion in model container [2022-12-14 13:48:29,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:48:29,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:48:29,827 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_f4d30895-7020-433a-83fe-3d67ff1d47df/sv-benchmarks/c/array-tiling/nr2.c[394,407] [2022-12-14 13:48:29,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:48:29,847 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:48:29,856 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_f4d30895-7020-433a-83fe-3d67ff1d47df/sv-benchmarks/c/array-tiling/nr2.c[394,407] [2022-12-14 13:48:29,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:48:29,870 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:48:29,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29 WrapperNode [2022-12-14 13:48:29,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:48:29,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:48:29,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:48:29,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:48:29,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,895 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-12-14 13:48:29,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:48:29,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:48:29,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:48:29,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:48:29,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:48:29,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:48:29,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:48:29,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:48:29,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (1/1) ... [2022-12-14 13:48:29,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:48:29,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:29,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:48:29,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:48:29,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:48:29,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:48:29,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:48:29,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:48:29,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:48:29,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:48:29,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:48:29,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:48:30,028 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:48:30,030 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:48:30,150 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:48:30,185 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:48:30,185 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 13:48:30,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:48:30 BoogieIcfgContainer [2022-12-14 13:48:30,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:48:30,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:48:30,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:48:30,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:48:30,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:48:29" (1/3) ... [2022-12-14 13:48:30,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2bfbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:48:30, skipping insertion in model container [2022-12-14 13:48:30,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:29" (2/3) ... [2022-12-14 13:48:30,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2bfbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:48:30, skipping insertion in model container [2022-12-14 13:48:30,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:48:30" (3/3) ... [2022-12-14 13:48:30,194 INFO L112 eAbstractionObserver]: Analyzing ICFG nr2.c [2022-12-14 13:48:30,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:48:30,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:48:30,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:48:30,250 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;@4927c863, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:48:30,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:48:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 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 13:48:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:48:30,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:30,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:30,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1530238989, now seen corresponding path program 1 times [2022-12-14 13:48:30,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:30,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008555410] [2022-12-14 13:48:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:30,618 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 13:48:30,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008555410] [2022-12-14 13:48:30,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008555410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:30,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:30,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:48:30,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616083836] [2022-12-14 13:48:30,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:48:30,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:48:30,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:48:30,660 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 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 13:48:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:30,720 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-12-14 13:48:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:48:30,722 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 13:48:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:30,727 INFO L225 Difference]: With dead ends: 26 [2022-12-14 13:48:30,728 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 13:48:30,730 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 13:48:30,732 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:30,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:48:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 13:48:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-12-14 13:48:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 13:48:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-12-14 13:48:30,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-12-14 13:48:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:30,759 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-12-14 13:48:30,759 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 13:48:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-12-14 13:48:30,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:48:30,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:30,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:30,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:48:30,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 646031458, now seen corresponding path program 1 times [2022-12-14 13:48:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:30,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659090949] [2022-12-14 13:48:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:30,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:30,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659090949] [2022-12-14 13:48:30,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659090949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:30,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:30,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:48:30,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149345081] [2022-12-14 13:48:30,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:30,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:30,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:30,822 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:30,845 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2022-12-14 13:48:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:48:30,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 13:48:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:30,846 INFO L225 Difference]: With dead ends: 19 [2022-12-14 13:48:30,846 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 13:48:30,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:30,848 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:30,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:48:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 13:48:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 13:48:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-14 13:48:30,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-12-14 13:48:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:30,853 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-14 13:48:30,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-14 13:48:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:48:30,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:30,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:30,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:48:30,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1553202252, now seen corresponding path program 1 times [2022-12-14 13:48:30,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:30,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316367311] [2022-12-14 13:48:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:30,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:30,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316367311] [2022-12-14 13:48:30,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316367311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493406769] [2022-12-14 13:48:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:30,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:30,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:30,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:48:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:30,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:48:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:31,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:31,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493406769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:31,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716746506] [2022-12-14 13:48:31,043 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:48:31,044 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:31,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:31,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:31,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,140 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:48:31,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:48:31,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,160 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 13:48:31,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:48:31,283 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:48:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,603 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:48:31,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 783 treesize of output 802 [2022-12-14 13:48:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:31,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:31,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 654 treesize of output 647 [2022-12-14 13:48:32,115 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:48:32,115 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 501 treesize of output 469 [2022-12-14 13:48:32,131 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 432 treesize of output 402 [2022-12-14 13:48:32,252 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 21 treesize of output 17 [2022-12-14 13:48:32,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:32,301 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 21 treesize of output 17 [2022-12-14 13:48:32,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:32,405 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:33,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '176#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (<= |ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_#t~mem8#1|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= |ULTIMATE.start_main_~MINVAL~0#1| 2) (<= |ULTIMATE.start_main_~DEFAULTVALUE~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2022-12-14 13:48:33,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:33,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:33,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-12-14 13:48:33,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951508231] [2022-12-14 13:48:33,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:33,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:48:33,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:48:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:48:33,080 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 13:48:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:33,096 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-12-14 13:48:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:48:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 10 [2022-12-14 13:48:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:33,097 INFO L225 Difference]: With dead ends: 21 [2022-12-14 13:48:33,097 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 13:48:33,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:48:33,098 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:33,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:48:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 13:48:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 13:48:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 13:48:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 13:48:33,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-12-14 13:48:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:33,101 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 13:48:33,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 13:48:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 13:48:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:48:33,102 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:33,102 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:33,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:48:33,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:33,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1009970526, now seen corresponding path program 2 times [2022-12-14 13:48:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:33,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053218421] [2022-12-14 13:48:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:33,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:33,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:33,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053218421] [2022-12-14 13:48:33,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053218421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:33,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470851446] [2022-12-14 13:48:33,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:48:33,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:33,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:33,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:48:33,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:48:33,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:48:33,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 13:48:33,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:33,776 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 39 treesize of output 50 [2022-12-14 13:48:33,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:48:33,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:33,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 13:48:33,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-12-14 13:48:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:33,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:33,967 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 13:48:34,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:34,013 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:48:34,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:34,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:48:34,046 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 104 treesize of output 90 [2022-12-14 13:48:34,053 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 63 treesize of output 59 [2022-12-14 13:48:34,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2022-12-14 13:48:34,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:34,076 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 87 treesize of output 86 [2022-12-14 13:48:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:34,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470851446] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:34,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114143289] [2022-12-14 13:48:34,176 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:48:34,176 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:34,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:34,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:34,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:34,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:34,213 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:48:34,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:48:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:34,224 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 13:48:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:34,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:34,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:48:34,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:34,286 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 103 [2022-12-14 13:48:34,297 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 3 [2022-12-14 13:48:34,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:34,396 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 21 treesize of output 17 [2022-12-14 13:48:34,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:34,475 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 21 treesize of output 17 [2022-12-14 13:48:34,585 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:35,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (<= |ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_#t~mem8#1|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= |ULTIMATE.start_main_~MINVAL~0#1| 2) (<= |ULTIMATE.start_main_~DEFAULTVALUE~0#1| 1) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2022-12-14 13:48:35,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:35,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:35,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-12-14 13:48:35,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544678072] [2022-12-14 13:48:35,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:35,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 13:48:35,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:35,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 13:48:35,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-12-14 13:48:35,262 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 13:48:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:35,695 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-12-14 13:48:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:48:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 11 [2022-12-14 13:48:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:35,696 INFO L225 Difference]: With dead ends: 41 [2022-12-14 13:48:35,696 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 13:48:35,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=1773, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 13:48:35,698 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 121 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:35,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 30 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 13:48:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 15. [2022-12-14 13:48:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-12-14 13:48:35,704 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-12-14 13:48:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:35,705 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-12-14 13:48:35,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 13:48:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-12-14 13:48:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:48:35,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:35,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:35,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:48:35,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:35,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1780752621, now seen corresponding path program 1 times [2022-12-14 13:48:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:35,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14992296] [2022-12-14 13:48:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:36,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14992296] [2022-12-14 13:48:36,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14992296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:36,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891074307] [2022-12-14 13:48:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:36,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:36,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:36,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:36,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:48:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:36,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 13:48:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:36,369 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 13:48:36,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-12-14 13:48:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:36,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:36,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:36,492 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:48:36,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:36,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:48:36,514 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 13:48:36,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:36,523 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 27 [2022-12-14 13:48:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:36,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891074307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:36,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1853236916] [2022-12-14 13:48:36,599 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:48:36,599 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:36,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:36,599 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:36,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,637 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:48:36,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:48:36,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,649 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 13:48:36,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:48:36,733 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:48:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,875 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:48:36,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 797 treesize of output 816 [2022-12-14 13:48:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:36,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:36,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 624 treesize of output 617 [2022-12-14 13:48:37,058 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:48:37,058 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 499 treesize of output 471 [2022-12-14 13:48:37,066 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 39 treesize of output 19 [2022-12-14 13:48:37,337 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 21 treesize of output 17 [2022-12-14 13:48:37,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:37,382 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 21 treesize of output 17 [2022-12-14 13:48:37,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:37,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:38,131 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '541#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:48:38,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:38,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:38,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-14 13:48:38,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543660435] [2022-12-14 13:48:38,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:38,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:48:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:48:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 13:48:38,134 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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 13:48:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:38,440 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-12-14 13:48:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 13:48:38,440 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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 14 [2022-12-14 13:48:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:38,441 INFO L225 Difference]: With dead ends: 34 [2022-12-14 13:48:38,441 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 13:48:38,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=324, Invalid=1746, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 13:48:38,444 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 79 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:38,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 31 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 13:48:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2022-12-14 13:48:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 13:48:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-12-14 13:48:38,452 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2022-12-14 13:48:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:38,452 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-12-14 13:48:38,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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 13:48:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-12-14 13:48:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 13:48:38,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:38,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:38,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:48:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:38,654 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1039986946, now seen corresponding path program 2 times [2022-12-14 13:48:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:38,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780367559] [2022-12-14 13:48:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:38,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:38,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:38,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780367559] [2022-12-14 13:48:38,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780367559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:38,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901601964] [2022-12-14 13:48:38,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:48:38,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:38,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:38,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:38,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:48:38,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:48:38,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:48:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:48:38,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:39,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:39,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901601964] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:39,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28124356] [2022-12-14 13:48:39,096 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:48:39,096 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:39,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:39,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:39,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:39,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,132 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:48:39,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:48:39,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,164 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:48:39,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:48:39,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:48:39,236 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:48:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,388 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:48:39,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 783 treesize of output 802 [2022-12-14 13:48:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:39,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:39,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 654 treesize of output 647 [2022-12-14 13:48:39,853 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:48:39,854 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 843 treesize of output 791 [2022-12-14 13:48:39,862 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 21 [2022-12-14 13:48:40,082 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 21 treesize of output 17 [2022-12-14 13:48:40,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:40,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:40,128 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 21 treesize of output 17 [2022-12-14 13:48:40,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:40,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '773#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:48:40,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:40,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:40,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-14 13:48:40,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950982582] [2022-12-14 13:48:40,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:40,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:48:40,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:48:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:48:40,880 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:41,046 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-12-14 13:48:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:48:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 13:48:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:41,047 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:48:41,047 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 13:48:41,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:48:41,048 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:41,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 40 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 13:48:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-12-14 13:48:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 13:48:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 13:48:41,052 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2022-12-14 13:48:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:41,052 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 13:48:41,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:48:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 13:48:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:48:41,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:41,053 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:41,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:48:41,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 13:48:41,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2069078404, now seen corresponding path program 3 times [2022-12-14 13:48:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:41,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097308684] [2022-12-14 13:48:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:41,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:41,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097308684] [2022-12-14 13:48:41,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097308684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929305932] [2022-12-14 13:48:41,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:48:41,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:41,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:41,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:41,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:48:41,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:48:41,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:48:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 13:48:41,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:41,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:48:41,951 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 13:48:41,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 13:48:41,967 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 13:48:42,088 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-12-14 13:48:42,088 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 2 case distinctions, treesize of input 71 treesize of output 83 [2022-12-14 13:48:42,104 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 24 treesize of output 13 [2022-12-14 13:48:42,107 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 13:48:42,122 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 38 treesize of output 26 [2022-12-14 13:48:42,162 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-12-14 13:48:42,162 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 2 case distinctions, treesize of input 71 treesize of output 83 [2022-12-14 13:48:42,171 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 13:48:42,184 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 52 treesize of output 38 [2022-12-14 13:48:42,190 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 38 treesize of output 26 [2022-12-14 13:48:42,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:48:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:42,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:42,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:42,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:42,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 58 [2022-12-14 13:48:42,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:42,797 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:48:42,797 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 92 treesize of output 88 [2022-12-14 13:48:42,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:48:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:48:42,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929305932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385314295] [2022-12-14 13:48:42,867 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:48:42,867 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:42,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:42,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:42,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:42,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:42,900 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:48:42,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:48:42,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:42,910 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 13:48:42,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:42,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:48:43,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:43,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:43,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:43,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:43,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:43,072 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:48:43,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:48:43,575 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:48:43,575 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 1020 treesize of output 982 [2022-12-14 13:48:43,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:43,591 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 951 treesize of output 927 [2022-12-14 13:48:43,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:43,710 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 21 treesize of output 17 [2022-12-14 13:48:43,745 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 21 treesize of output 17 [2022-12-14 13:48:43,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:43,914 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:44,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1018#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:48:44,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:44,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:44,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 34 [2022-12-14 13:48:44,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908041001] [2022-12-14 13:48:44,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:44,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 13:48:44,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 13:48:44,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:48:44,569 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 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 13:48:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:47,330 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-12-14 13:48:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 13:48:47,330 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 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 18 [2022-12-14 13:48:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:47,331 INFO L225 Difference]: With dead ends: 73 [2022-12-14 13:48:47,331 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 13:48:47,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=802, Invalid=5360, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 13:48:47,332 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 250 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:47,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 86 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:48:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 13:48:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 26. [2022-12-14 13:48:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 13:48:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-14 13:48:47,340 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2022-12-14 13:48:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:47,340 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-14 13:48:47,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 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 13:48:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-14 13:48:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 13:48:47,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:47,341 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:47,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:48:47,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:47,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1450619663, now seen corresponding path program 4 times [2022-12-14 13:48:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582294407] [2022-12-14 13:48:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:47,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:47,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:47,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582294407] [2022-12-14 13:48:47,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582294407] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:47,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434044903] [2022-12-14 13:48:47,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:48:47,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:47,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:47,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:47,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:48:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:47,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 13:48:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:48,015 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 13:48:48,048 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 42 treesize of output 50 [2022-12-14 13:48:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 13:48:48,059 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 8 treesize of output 1 [2022-12-14 13:48:48,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-12-14 13:48:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:48,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:48,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:48:48,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:48,356 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:48:48,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:48,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:48:48,384 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 121 treesize of output 106 [2022-12-14 13:48:48,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2022-12-14 13:48:48,391 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 118 treesize of output 110 [2022-12-14 13:48:48,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:48,398 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 154 treesize of output 151 [2022-12-14 13:48:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:48,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434044903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:48,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312751804] [2022-12-14 13:48:48,507 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:48:48,507 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:48,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:48,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:48,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,535 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:48:48,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:48:48,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,543 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 13:48:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:48:48,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:48,711 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:48:48,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:48:48,819 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:48:48,819 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 1022 treesize of output 976 [2022-12-14 13:48:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:48,833 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 953 treesize of output 929 [2022-12-14 13:48:49,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:49,246 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 21 treesize of output 17 [2022-12-14 13:48:49,283 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 19 treesize of output 15 [2022-12-14 13:48:49,289 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 21 treesize of output 17 [2022-12-14 13:48:49,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:50,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1409#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:48:50,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:50,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:50,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-12-14 13:48:50,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915341568] [2022-12-14 13:48:50,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:50,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 13:48:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:50,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 13:48:50,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 13:48:50,025 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 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 13:48:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:50,614 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-12-14 13:48:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 13:48:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 13:48:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:50,615 INFO L225 Difference]: With dead ends: 61 [2022-12-14 13:48:50,615 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 13:48:50,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=550, Invalid=3356, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 13:48:50,617 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 146 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:50,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 55 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 13:48:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2022-12-14 13:48:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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 13:48:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-12-14 13:48:50,624 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2022-12-14 13:48:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:50,625 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-12-14 13:48:50,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 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 13:48:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-12-14 13:48:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:48:50,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:50,625 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:50,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:48:50,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:50,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:50,826 INFO L85 PathProgramCache]: Analyzing trace with hash 555830884, now seen corresponding path program 5 times [2022-12-14 13:48:50,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:50,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335185853] [2022-12-14 13:48:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:50,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:51,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:51,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335185853] [2022-12-14 13:48:51,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335185853] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:51,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121823258] [2022-12-14 13:48:51,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:48:51,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:51,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:51,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:48:51,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 13:48:51,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:48:51,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:48:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:51,353 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 32 treesize of output 43 [2022-12-14 13:48:51,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-12-14 13:48:51,368 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 8 treesize of output 1 [2022-12-14 13:48:51,379 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 13:48:51,609 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 13:48:51,609 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 29 treesize of output 17 [2022-12-14 13:48:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:48:51,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:51,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:51,732 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:48:51,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:51,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:48:51,745 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 13:48:51,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-12-14 13:48:51,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:51,751 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 34 treesize of output 35 [2022-12-14 13:48:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:48:51,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121823258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841718244] [2022-12-14 13:48:51,777 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:48:51,778 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:51,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:51,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:51,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:51,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,802 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:48:51,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:48:51,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,826 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:48:51,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:48:51,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:48:51,873 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:48:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:51,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:52,009 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:48:52,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 771 treesize of output 790 [2022-12-14 13:48:52,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:52,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:52,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:52,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:48:52,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 602 treesize of output 599 [2022-12-14 13:48:52,399 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:48:52,400 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 843 treesize of output 787 [2022-12-14 13:48:52,412 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 772 treesize of output 732 [2022-12-14 13:48:52,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:52,675 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 21 treesize of output 17 [2022-12-14 13:48:52,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:52,708 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 21 treesize of output 17 [2022-12-14 13:48:52,855 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:53,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1781#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:48:53,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:53,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:53,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-12-14 13:48:53,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995710921] [2022-12-14 13:48:53,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:53,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 13:48:53,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:53,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 13:48:53,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:48:53,308 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 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 13:48:54,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:54,027 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-12-14 13:48:54,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 13:48:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 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 24 [2022-12-14 13:48:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:54,028 INFO L225 Difference]: With dead ends: 60 [2022-12-14 13:48:54,028 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 13:48:54,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=475, Invalid=2831, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 13:48:54,029 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:54,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 54 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 13:48:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2022-12-14 13:48:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 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 13:48:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-12-14 13:48:54,041 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 24 [2022-12-14 13:48:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:54,041 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-12-14 13:48:54,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 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 13:48:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-12-14 13:48:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 13:48:54,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:54,042 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:54,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:48:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:54,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1664218129, now seen corresponding path program 6 times [2022-12-14 13:48:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:54,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464008359] [2022-12-14 13:48:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:48:54,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:54,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464008359] [2022-12-14 13:48:54,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464008359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:54,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469150255] [2022-12-14 13:48:54,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:48:54,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:54,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:54,520 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:54,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:48:54,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:48:54,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:48:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:48:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:48:54,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:48:54,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469150255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:48:54,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604635038] [2022-12-14 13:48:54,951 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:48:54,951 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:48:54,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:48:54,952 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:48:54,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:48:54,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:54,981 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:48:54,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:48:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:55,009 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:48:55,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:48:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:55,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:48:55,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:55,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:55,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:55,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:55,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:55,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:48:55,175 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:48:55,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:48:55,488 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:48:55,488 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 1022 treesize of output 978 [2022-12-14 13:48:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:48:55,501 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 955 treesize of output 938 [2022-12-14 13:48:55,702 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 21 treesize of output 17 [2022-12-14 13:48:55,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:48:55,740 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 19 treesize of output 15 [2022-12-14 13:48:55,746 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 21 treesize of output 17 [2022-12-14 13:48:55,901 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:48:56,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2168#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:48:56,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:48:56,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:48:56,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-12-14 13:48:56,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507900195] [2022-12-14 13:48:56,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:48:56,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:48:56,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:48:56,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:48:56,402 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 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 13:48:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:56,708 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-12-14 13:48:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:48:56,708 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 13:48:56,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:56,708 INFO L225 Difference]: With dead ends: 61 [2022-12-14 13:48:56,708 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:48:56,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 13:48:56,709 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 60 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:56,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 55 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:48:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-12-14 13:48:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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 13:48:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-14 13:48:56,721 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 27 [2022-12-14 13:48:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:56,721 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-14 13:48:56,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 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 13:48:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-14 13:48:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 13:48:56,722 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:56,722 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:56,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:48:56,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:56,923 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:48:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash -431917163, now seen corresponding path program 7 times [2022-12-14 13:48:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:56,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845706065] [2022-12-14 13:48:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:56,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:57,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845706065] [2022-12-14 13:48:57,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845706065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:48:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869864751] [2022-12-14 13:48:57,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:48:57,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:48:57,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:57,480 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:48:57,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:48:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:57,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 13:48:57,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:48:57,627 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 34 treesize of output 45 [2022-12-14 13:48:57,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-12-14 13:48:57,637 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 8 treesize of output 1 [2022-12-14 13:48:57,729 INFO L321 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2022-12-14 13:48:57,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 13:48:57,771 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 55 [2022-12-14 13:48:57,782 INFO L321 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-12-14 13:48:57,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-12-14 13:48:58,015 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 13:48:58,015 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 54 treesize of output 36 [2022-12-14 13:48:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:48:58,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:48:58,108 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 13:48:58,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-14 13:49:10,300 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:49:12,318 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~j~0#1_119| Int)) (or (not (<= |v_ULTIMATE.start_main_~j~0#1_119| 1)) (forall ((v_ArrVal_309 Int) (v_ArrVal_306 Int)) (= (select (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_306) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_119| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_309)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0)))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|)) is different from false [2022-12-14 13:49:14,337 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_184| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_119| Int)) (or (forall ((v_ArrVal_309 Int) (v_ArrVal_306 Int)) (= (select (let ((.cse0 (* 8 |v_ULTIMATE.start_main_~i~0#1_184|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_306) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_119| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_309)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0)) (not (<= |v_ULTIMATE.start_main_~j~0#1_119| 1)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_184|)))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|)) is different from false [2022-12-14 13:49:14,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:14,362 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:49:14,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:14,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:49:14,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:14,421 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 32 treesize of output 28 [2022-12-14 13:49:14,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-14 13:49:14,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:14,438 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 106 treesize of output 107 [2022-12-14 13:49:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 11 not checked. [2022-12-14 13:49:14,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869864751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:14,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485738749] [2022-12-14 13:49:14,608 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:49:14,608 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:14,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:14,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:14,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:14,644 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:49:14,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:49:14,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:14,678 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:49:14,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:49:14,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:14,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:49:14,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:14,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:14,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:14,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:14,849 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:49:14,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:49:15,366 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:49:15,367 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 1022 treesize of output 968 [2022-12-14 13:49:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:15,379 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 953 treesize of output 929 [2022-12-14 13:49:15,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:15,520 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 21 treesize of output 17 [2022-12-14 13:49:15,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:15,555 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 21 treesize of output 17 [2022-12-14 13:49:15,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:16,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2560#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:49:16,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:16,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:16,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 43 [2022-12-14 13:49:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892498120] [2022-12-14 13:49:16,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:16,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 13:49:16,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:16,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 13:49:16,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2092, Unknown=3, NotChecked=190, Total=2550 [2022-12-14 13:49:16,448 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 43 states have internal predecessors, (73), 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 13:49:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:17,935 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-12-14 13:49:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 13:49:17,935 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 43 states have internal predecessors, (73), 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 28 [2022-12-14 13:49:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:17,936 INFO L225 Difference]: With dead ends: 59 [2022-12-14 13:49:17,936 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 13:49:17,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=698, Invalid=4563, Unknown=3, NotChecked=286, Total=5550 [2022-12-14 13:49:17,937 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:17,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 66 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 416 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-12-14 13:49:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 13:49:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-12-14 13:49:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 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 13:49:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-12-14 13:49:17,947 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2022-12-14 13:49:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:17,948 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-12-14 13:49:17,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.697674418604651) internal successors, (73), 43 states have internal predecessors, (73), 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 13:49:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-12-14 13:49:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 13:49:17,948 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:17,948 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:17,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:49:18,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:18,149 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:18,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:18,150 INFO L85 PathProgramCache]: Analyzing trace with hash 483094848, now seen corresponding path program 8 times [2022-12-14 13:49:18,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:18,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370613084] [2022-12-14 13:49:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:18,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:49:18,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370613084] [2022-12-14 13:49:18,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370613084] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:18,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30571088] [2022-12-14 13:49:18,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:49:18,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:18,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:18,699 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:18,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:49:18,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:49:18,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:49:18,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 13:49:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:18,857 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 39 treesize of output 50 [2022-12-14 13:49:18,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:49:18,878 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 26 treesize of output 15 [2022-12-14 13:49:18,880 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 15 treesize of output 5 [2022-12-14 13:49:18,923 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 59 treesize of output 67 [2022-12-14 13:49:18,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 13:49:18,950 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 26 treesize of output 15 [2022-12-14 13:49:18,953 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 15 treesize of output 5 [2022-12-14 13:49:19,473 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 13:49:19,474 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 59 treesize of output 38 [2022-12-14 13:49:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:49:19,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:49:19,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:49:19,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:19,790 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:49:19,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:19,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:49:19,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-12-14 13:49:19,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:19,834 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 136 treesize of output 133 [2022-12-14 13:49:19,838 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 142 treesize of output 134 [2022-12-14 13:49:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:49:19,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30571088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846209352] [2022-12-14 13:49:19,906 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:49:19,906 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:19,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:19,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:19,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:19,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:19,941 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:49:19,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:49:19,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:19,967 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:49:19,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:49:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:19,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:49:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:20,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:20,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:20,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:20,118 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:49:20,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:49:20,301 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:49:20,301 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 589 treesize of output 563 [2022-12-14 13:49:20,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:20,311 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 520 treesize of output 496 [2022-12-14 13:49:20,450 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 21 treesize of output 17 [2022-12-14 13:49:20,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:20,493 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 21 treesize of output 17 [2022-12-14 13:49:20,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:20,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:21,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2975#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:49:21,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:21,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:21,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2022-12-14 13:49:21,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887968373] [2022-12-14 13:49:21,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:21,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 13:49:21,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 13:49:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 13:49:21,344 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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 13:49:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:24,348 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-12-14 13:49:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 13:49:24,348 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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 31 [2022-12-14 13:49:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:24,349 INFO L225 Difference]: With dead ends: 71 [2022-12-14 13:49:24,349 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 13:49:24,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=882, Invalid=6258, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 13:49:24,352 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 165 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:24,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 68 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:49:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 13:49:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 35. [2022-12-14 13:49:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 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 13:49:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-14 13:49:24,375 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2022-12-14 13:49:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:24,376 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-14 13:49:24,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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 13:49:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-14 13:49:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 13:49:24,377 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:24,377 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:24,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:49:24,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:49:24,578 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash -551513163, now seen corresponding path program 9 times [2022-12-14 13:49:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:24,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083355063] [2022-12-14 13:49:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:49:24,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:24,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083355063] [2022-12-14 13:49:24,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083355063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:24,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260164210] [2022-12-14 13:49:24,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:49:24,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:24,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:24,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:24,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:49:25,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:49:25,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:49:25,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 13:49:25,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:25,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:49:25,192 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 13:49:25,195 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 13:49:25,201 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 13:49:25,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:49:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 1 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:49:25,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:49:25,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:25,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:25,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 58 [2022-12-14 13:49:25,983 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:49:25,984 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 41 treesize of output 33 [2022-12-14 13:49:25,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:49:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 76 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 13:49:26,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260164210] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:26,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584215512] [2022-12-14 13:49:26,197 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:49:26,197 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:26,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:26,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:26,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,227 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:49:26,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:49:26,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,236 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 13:49:26,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:49:26,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:26,392 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:49:26,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:49:26,572 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:49:26,572 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 1022 treesize of output 986 [2022-12-14 13:49:26,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:26,594 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 955 treesize of output 938 [2022-12-14 13:49:26,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:26,948 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 21 treesize of output 17 [2022-12-14 13:49:26,977 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 19 treesize of output 15 [2022-12-14 13:49:26,983 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 21 treesize of output 17 [2022-12-14 13:49:27,132 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:27,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3475#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:49:27,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:27,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:27,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2022-12-14 13:49:27,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581156512] [2022-12-14 13:49:27,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:27,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 13:49:27,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 13:49:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2556, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:49:27,954 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 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 13:49:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:30,577 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2022-12-14 13:49:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 13:49:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 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 34 [2022-12-14 13:49:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:30,578 INFO L225 Difference]: With dead ends: 77 [2022-12-14 13:49:30,578 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 13:49:30,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=886, Invalid=8426, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 13:49:30,580 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 309 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:30,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 125 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:49:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 13:49:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 38. [2022-12-14 13:49:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 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 13:49:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-12-14 13:49:30,598 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2022-12-14 13:49:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:30,599 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-12-14 13:49:30,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 45 states have internal predecessors, (92), 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 13:49:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-12-14 13:49:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 13:49:30,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:30,600 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:30,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:49:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:30,800 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1873452768, now seen corresponding path program 10 times [2022-12-14 13:49:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821380866] [2022-12-14 13:49:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:30,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:49:31,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:31,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821380866] [2022-12-14 13:49:31,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821380866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:31,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744566208] [2022-12-14 13:49:31,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:49:31,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:31,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:31,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:49:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:31,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:49:31,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:49:31,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:49:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:49:31,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744566208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:31,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [807269889] [2022-12-14 13:49:31,706 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:49:31,707 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:31,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:31,707 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:31,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:31,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:31,739 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:49:31,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:49:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:31,748 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 13:49:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:31,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:49:31,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:31,807 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 139 treesize of output 113 [2022-12-14 13:49:31,818 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 3 [2022-12-14 13:49:31,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:31,878 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 21 treesize of output 17 [2022-12-14 13:49:31,908 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 19 treesize of output 15 [2022-12-14 13:49:31,914 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 21 treesize of output 17 [2022-12-14 13:49:31,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:31,960 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 21 treesize of output 17 [2022-12-14 13:49:32,112 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:32,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3998#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:49:32,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:32,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:32,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2022-12-14 13:49:32,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531531843] [2022-12-14 13:49:32,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:32,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 13:49:32,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 13:49:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 13:49:32,710 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 states have internal predecessors, (95), 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 13:49:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:33,070 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-12-14 13:49:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 13:49:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 states have internal predecessors, (95), 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 37 [2022-12-14 13:49:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:33,071 INFO L225 Difference]: With dead ends: 69 [2022-12-14 13:49:33,072 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:49:33,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 13:49:33,073 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:33,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 75 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:49:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:49:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-12-14 13:49:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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 13:49:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-12-14 13:49:33,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2022-12-14 13:49:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:33,091 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-12-14 13:49:33,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 states have internal predecessors, (95), 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 13:49:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-12-14 13:49:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 13:49:33,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:33,092 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:33,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 13:49:33,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:49:33,293 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:33,294 INFO L85 PathProgramCache]: Analyzing trace with hash -537694321, now seen corresponding path program 11 times [2022-12-14 13:49:33,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:33,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535224768] [2022-12-14 13:49:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:33,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:49:33,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535224768] [2022-12-14 13:49:33,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535224768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256474353] [2022-12-14 13:49:33,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:49:33,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:33,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:33,830 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:33,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:49:34,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 13:49:34,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:49:34,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 13:49:34,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:34,276 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 39 treesize of output 50 [2022-12-14 13:49:34,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:49:34,282 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 8 treesize of output 1 [2022-12-14 13:49:34,296 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 15 treesize of output 5 [2022-12-14 13:49:34,329 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 59 treesize of output 67 [2022-12-14 13:49:34,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 13:49:34,348 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 26 treesize of output 15 [2022-12-14 13:49:34,350 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 15 treesize of output 5 [2022-12-14 13:49:34,991 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 13:49:34,991 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 59 treesize of output 38 [2022-12-14 13:49:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 3 proven. 123 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:49:35,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:49:35,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:49:35,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:35,387 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:49:35,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:35,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:49:35,417 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 127 treesize of output 112 [2022-12-14 13:49:35,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-12-14 13:49:35,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:35,424 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 72 treesize of output 64 [2022-12-14 13:49:35,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:35,430 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 106 treesize of output 103 [2022-12-14 13:49:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:49:35,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256474353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:35,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84908278] [2022-12-14 13:49:35,527 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:49:35,527 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:35,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:35,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:35,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:35,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,554 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:49:35,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:49:35,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,563 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 13:49:35,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:49:35,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:35,712 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:49:35,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:49:35,906 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:49:35,907 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 1022 treesize of output 986 [2022-12-14 13:49:35,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:35,924 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 955 treesize of output 938 [2022-12-14 13:49:36,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:36,258 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 21 treesize of output 17 [2022-12-14 13:49:36,293 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 21 treesize of output 17 [2022-12-14 13:49:36,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:36,430 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:37,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4477#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:49:37,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:37,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:37,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 41 [2022-12-14 13:49:37,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500655480] [2022-12-14 13:49:37,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:37,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 13:49:37,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:37,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 13:49:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2136, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 13:49:37,211 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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 13:49:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:41,891 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-12-14 13:49:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 13:49:41,891 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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 41 [2022-12-14 13:49:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:41,892 INFO L225 Difference]: With dead ends: 91 [2022-12-14 13:49:41,892 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 13:49:41,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=995, Invalid=9105, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 13:49:41,894 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 150 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:41,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 155 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:49:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 13:49:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 45. [2022-12-14 13:49:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 13:49:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-12-14 13:49:41,918 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2022-12-14 13:49:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:41,918 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-12-14 13:49:41,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 41 states have internal predecessors, (90), 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 13:49:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-12-14 13:49:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 13:49:41,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:41,919 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:41,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:49:42,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:49:42,120 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1781776134, now seen corresponding path program 12 times [2022-12-14 13:49:42,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:42,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109342520] [2022-12-14 13:49:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:42,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:49:42,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109342520] [2022-12-14 13:49:42,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109342520] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746847014] [2022-12-14 13:49:42,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:49:42,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:42,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:42,586 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:42,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:49:42,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:49:42,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:49:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 13:49:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:42,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:49:42,842 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 13:49:42,858 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 13:49:42,860 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 13:49:43,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:49:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:49:43,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:49:43,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:43,783 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 48 treesize of output 58 [2022-12-14 13:49:43,803 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:49:43,803 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 43 treesize of output 39 [2022-12-14 13:49:43,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:49:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:49:43,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746847014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:43,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276075777] [2022-12-14 13:49:43,979 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:49:43,979 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:43,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:43,979 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:43,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:43,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:44,005 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:49:44,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:49:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:44,031 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:49:44,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:49:44,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:44,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:44,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:49:44,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:44,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:44,091 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 128 treesize of output 104 [2022-12-14 13:49:44,098 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 3 [2022-12-14 13:49:44,148 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 19 treesize of output 15 [2022-12-14 13:49:44,154 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 21 treesize of output 17 [2022-12-14 13:49:44,178 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 21 treesize of output 17 [2022-12-14 13:49:44,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:44,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:44,218 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 21 treesize of output 17 [2022-12-14 13:49:44,390 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:45,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5109#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:49:45,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:45,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:45,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2022-12-14 13:49:45,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295826482] [2022-12-14 13:49:45,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:45,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 13:49:45,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 13:49:45,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3210, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 13:49:45,155 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 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 13:49:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:47,717 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-12-14 13:49:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 13:49:47,718 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 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 44 [2022-12-14 13:49:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:47,718 INFO L225 Difference]: With dead ends: 97 [2022-12-14 13:49:47,718 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 13:49:47,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2957 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=787, Invalid=10555, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 13:49:47,720 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 174 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:47,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 221 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:49:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 13:49:47,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 48. [2022-12-14 13:49:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 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 13:49:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-12-14 13:49:47,744 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2022-12-14 13:49:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:47,744 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-12-14 13:49:47,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 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 13:49:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-12-14 13:49:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 13:49:47,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:47,745 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:47,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:49:47,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:49:47,946 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash -602724305, now seen corresponding path program 13 times [2022-12-14 13:49:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:47,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671530789] [2022-12-14 13:49:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:47,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 78 proven. 86 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:49:48,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671530789] [2022-12-14 13:49:48,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671530789] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875580345] [2022-12-14 13:49:48,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:49:48,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:48,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:48,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:49:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:48,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:49:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 100 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:49:48,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:49:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 100 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:49:49,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875580345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:49,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868283012] [2022-12-14 13:49:49,176 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:49:49,177 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:49,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:49,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:49,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:49,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:49,206 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:49:49,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:49:49,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:49,234 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:49:49,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:49:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:49,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:49:49,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:49,289 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 135 treesize of output 109 [2022-12-14 13:49:49,299 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 3 [2022-12-14 13:49:49,359 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 21 treesize of output 17 [2022-12-14 13:49:49,364 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 19 treesize of output 15 [2022-12-14 13:49:49,399 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 21 treesize of output 17 [2022-12-14 13:49:49,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:49,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:49,439 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 21 treesize of output 17 [2022-12-14 13:49:49,613 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:50,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5757#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:49:50,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:50,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:50,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2022-12-14 13:49:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70546912] [2022-12-14 13:49:50,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 13:49:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:50,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 13:49:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2275, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:49:50,192 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 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 13:49:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:50,553 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2022-12-14 13:49:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 13:49:50,553 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 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 47 [2022-12-14 13:49:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:50,554 INFO L225 Difference]: With dead ends: 85 [2022-12-14 13:49:50,554 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 13:49:50,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=3380, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 13:49:50,555 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:50,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 98 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:49:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 13:49:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-12-14 13:49:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:49:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-12-14 13:49:50,595 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2022-12-14 13:49:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:50,595 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-12-14 13:49:50,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 45 states have internal predecessors, (122), 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 13:49:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-12-14 13:49:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 13:49:50,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:50,595 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:50,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:49:50,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:49:50,796 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:49:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -819906594, now seen corresponding path program 14 times [2022-12-14 13:49:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:50,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008624802] [2022-12-14 13:49:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:50,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:49:51,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:51,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008624802] [2022-12-14 13:49:51,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008624802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:49:51,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069918920] [2022-12-14 13:49:51,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:49:51,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:49:51,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:49:51,424 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:49:51,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:49:51,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 13:49:51,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:49:51,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 13:49:51,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:49:51,918 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 39 treesize of output 50 [2022-12-14 13:49:51,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:49:51,933 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 26 treesize of output 15 [2022-12-14 13:49:51,934 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 15 treesize of output 5 [2022-12-14 13:49:51,974 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 59 treesize of output 67 [2022-12-14 13:49:51,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 13:49:51,987 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 8 treesize of output 1 [2022-12-14 13:49:52,004 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 15 treesize of output 5 [2022-12-14 13:49:52,926 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 13:49:52,926 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 59 treesize of output 38 [2022-12-14 13:49:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 3 proven. 207 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:49:52,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:49:53,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:49:53,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:53,444 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:49:53,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:53,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:49:53,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:49:53,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:49:53,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2022-12-14 13:49:53,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:53,500 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 91 treesize of output 88 [2022-12-14 13:49:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:49:53,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069918920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:49:53,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [728957287] [2022-12-14 13:49:53,670 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:49:53,670 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:49:53,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:49:53,670 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:49:53,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:49:53,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,702 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:49:53,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:49:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,709 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 13:49:53,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:49:53,775 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:49:53,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,897 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:49:53,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 778 treesize of output 797 [2022-12-14 13:49:53,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:49:53,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:49:53,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 587 treesize of output 584 [2022-12-14 13:49:54,298 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:49:54,298 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 843 treesize of output 807 [2022-12-14 13:49:54,307 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 41 treesize of output 21 [2022-12-14 13:49:54,524 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 21 treesize of output 17 [2022-12-14 13:49:54,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:54,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:49:54,567 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 21 treesize of output 17 [2022-12-14 13:49:54,717 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:49:55,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6350#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:49:55,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:49:55,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:49:55,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 24] total 51 [2022-12-14 13:49:55,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596978039] [2022-12-14 13:49:55,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:49:55,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 13:49:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 13:49:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 13:49:55,560 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 51 states have internal predecessors, (112), 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 13:50:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:04,768 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2022-12-14 13:50:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 13:50:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 51 states have internal predecessors, (112), 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 51 [2022-12-14 13:50:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:04,768 INFO L225 Difference]: With dead ends: 123 [2022-12-14 13:50:04,768 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 13:50:04,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6410 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1704, Invalid=20052, Unknown=0, NotChecked=0, Total=21756 [2022-12-14 13:50:04,770 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 209 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:04,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 254 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 13:50:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 13:50:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2022-12-14 13:50:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 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 13:50:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-12-14 13:50:04,803 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2022-12-14 13:50:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:04,803 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-12-14 13:50:04,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.196078431372549) internal successors, (112), 51 states have internal predecessors, (112), 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 13:50:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-12-14 13:50:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 13:50:04,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:04,804 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:04,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:50:05,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:50:05,005 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:50:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash -353050537, now seen corresponding path program 15 times [2022-12-14 13:50:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:05,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171287019] [2022-12-14 13:50:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:05,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:50:05,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171287019] [2022-12-14 13:50:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171287019] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:50:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413273589] [2022-12-14 13:50:05,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:50:05,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:05,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:50:05,647 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:50:05,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:50:05,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:50:05,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:50:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 13:50:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:50:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:05,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:50:05,970 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 13:50:05,979 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 18 treesize of output 7 [2022-12-14 13:50:05,981 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 13:50:06,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:50:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 1 proven. 236 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:50:06,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:50:07,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:07,282 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 48 treesize of output 58 [2022-12-14 13:50:07,309 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:50:07,310 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 43 treesize of output 39 [2022-12-14 13:50:07,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:50:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 3 proven. 234 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:50:07,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413273589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:50:07,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914021033] [2022-12-14 13:50:07,714 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:50:07,714 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:50:07,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:50:07,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:50:07,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:50:07,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:07,750 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:50:07,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:50:07,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:07,759 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 13:50:07,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:07,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:50:07,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:07,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:07,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:07,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:07,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:50:07,943 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:50:07,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:50:08,068 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:50:08,069 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 1022 treesize of output 978 [2022-12-14 13:50:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:08,085 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 955 treesize of output 938 [2022-12-14 13:50:08,463 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 21 treesize of output 17 [2022-12-14 13:50:08,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:50:08,504 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 21 treesize of output 17 [2022-12-14 13:50:08,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:50:08,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:50:09,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7192#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:50:09,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:50:09,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:50:09,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 63 [2022-12-14 13:50:09,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753881572] [2022-12-14 13:50:09,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:50:09,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 13:50:09,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:09,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 13:50:09,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4700, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 13:50:09,517 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 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 13:50:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:14,422 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2022-12-14 13:50:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 13:50:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 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 54 [2022-12-14 13:50:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:14,424 INFO L225 Difference]: With dead ends: 117 [2022-12-14 13:50:14,424 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 13:50:14,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5193 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1109, Invalid=18073, Unknown=0, NotChecked=0, Total=19182 [2022-12-14 13:50:14,425 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 199 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:14,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 370 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 13:50:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 13:50:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 58. [2022-12-14 13:50:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:50:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-12-14 13:50:14,462 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2022-12-14 13:50:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:14,462 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-12-14 13:50:14,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 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 13:50:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-12-14 13:50:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 13:50:14,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:14,463 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:14,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 13:50:14,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:14,664 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:50:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:14,665 INFO L85 PathProgramCache]: Analyzing trace with hash 651639102, now seen corresponding path program 16 times [2022-12-14 13:50:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:14,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263503632] [2022-12-14 13:50:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:14,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 127 proven. 133 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:15,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263503632] [2022-12-14 13:50:15,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263503632] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:50:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896965327] [2022-12-14 13:50:15,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:50:15,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:50:15,191 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:50:15,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:50:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:50:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:50:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 155 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:15,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:50:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 155 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:16,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896965327] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:50:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1388938966] [2022-12-14 13:50:16,120 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:50:16,120 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:50:16,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:50:16,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:50:16,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:50:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,146 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:50:16,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:50:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,155 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 13:50:16,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:50:16,196 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:50:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,344 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:50:16,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 775 treesize of output 794 [2022-12-14 13:50:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:16,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:16,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 638 treesize of output 631 [2022-12-14 13:50:16,556 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:50:16,557 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 860 treesize of output 828 [2022-12-14 13:50:16,577 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 789 treesize of output 749 [2022-12-14 13:50:16,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:50:16,988 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 21 treesize of output 17 [2022-12-14 13:50:17,022 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 21 treesize of output 17 [2022-12-14 13:50:17,027 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 19 treesize of output 15 [2022-12-14 13:50:17,189 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:50:17,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7998#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:50:17,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:50:17,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:50:17,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 55 [2022-12-14 13:50:17,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644148160] [2022-12-14 13:50:17,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:50:17,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 13:50:17,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 13:50:17,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3205, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 13:50:17,871 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 55 states, 55 states have (on average 2.727272727272727) internal successors, (150), 55 states have internal predecessors, (150), 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 13:50:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:18,399 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2022-12-14 13:50:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 13:50:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.727272727272727) internal successors, (150), 55 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 13:50:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:18,400 INFO L225 Difference]: With dead ends: 101 [2022-12-14 13:50:18,400 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 13:50:18,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1120, Invalid=4732, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 13:50:18,401 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 125 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:18,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 114 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:50:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 13:50:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-12-14 13:50:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 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 13:50:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-12-14 13:50:18,444 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2022-12-14 13:50:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:18,444 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-12-14 13:50:18,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.727272727272727) internal successors, (150), 55 states have internal predecessors, (150), 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 13:50:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-12-14 13:50:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 13:50:18,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:18,444 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:18,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 13:50:18,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 13:50:18,645 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:50:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1328855597, now seen corresponding path program 17 times [2022-12-14 13:50:18,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:18,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870112448] [2022-12-14 13:50:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:18,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 314 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:19,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:19,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870112448] [2022-12-14 13:50:19,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870112448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:50:19,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970218110] [2022-12-14 13:50:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:50:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:50:19,407 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:50:19,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 13:50:20,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 13:50:20,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:50:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 13:50:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:50:20,693 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 39 treesize of output 50 [2022-12-14 13:50:20,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:50:20,715 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 26 treesize of output 15 [2022-12-14 13:50:20,717 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 15 treesize of output 5 [2022-12-14 13:50:20,764 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 59 treesize of output 67 [2022-12-14 13:50:20,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 13:50:20,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-12-14 13:50:20,789 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 15 treesize of output 5 [2022-12-14 13:50:21,978 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 13:50:21,978 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 59 treesize of output 38 [2022-12-14 13:50:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 1 proven. 313 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:22,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:50:22,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:50:22,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:22,608 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:50:22,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:22,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:50:22,639 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 112 treesize of output 98 [2022-12-14 13:50:22,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 108 [2022-12-14 13:50:22,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:50:22,646 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 72 treesize of output 64 [2022-12-14 13:50:22,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:22,653 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 106 treesize of output 103 [2022-12-14 13:50:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 314 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:22,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970218110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:50:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263039660] [2022-12-14 13:50:22,765 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:50:22,765 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:50:22,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:50:22,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:50:22,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:50:22,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:22,795 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:50:22,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:50:22,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:22,803 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 13:50:22,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:22,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:50:22,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:22,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:22,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:22,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:50:22,951 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:50:22,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:50:23,067 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:50:23,068 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 1022 treesize of output 994 [2022-12-14 13:50:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:23,084 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 955 treesize of output 938 [2022-12-14 13:50:23,503 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 21 treesize of output 17 [2022-12-14 13:50:23,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:50:23,539 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 19 treesize of output 15 [2022-12-14 13:50:23,543 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 21 treesize of output 17 [2022-12-14 13:50:23,710 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:50:24,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8699#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:50:24,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:50:24,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:50:24,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 55 [2022-12-14 13:50:24,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536651170] [2022-12-14 13:50:24,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:50:24,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 13:50:24,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:24,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 13:50:24,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 13:50:24,640 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 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 13:50:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:32,770 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2022-12-14 13:50:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-14 13:50:32,770 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 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 61 [2022-12-14 13:50:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:32,771 INFO L225 Difference]: With dead ends: 131 [2022-12-14 13:50:32,771 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 13:50:32,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5518 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1486, Invalid=18536, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 13:50:32,772 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:32,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 288 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1870 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 13:50:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 13:50:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 65. [2022-12-14 13:50:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 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 13:50:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-12-14 13:50:32,820 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2022-12-14 13:50:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:32,820 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-12-14 13:50:32,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 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 13:50:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-12-14 13:50:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 13:50:32,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:32,821 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:32,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 13:50:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:33,022 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:50:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:33,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1228801960, now seen corresponding path program 18 times [2022-12-14 13:50:33,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:33,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964926803] [2022-12-14 13:50:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:33,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:33,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964926803] [2022-12-14 13:50:33,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964926803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:50:33,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584593533] [2022-12-14 13:50:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:50:33,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:50:33,703 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:50:33,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:50:33,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:50:33,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:50:33,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 13:50:33,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:50:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:34,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:50:34,109 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 13:50:34,113 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 13:50:34,115 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 7 treesize of output 3 [2022-12-14 13:50:35,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:50:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:35,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:50:35,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:35,785 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 48 treesize of output 58 [2022-12-14 13:50:35,806 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 56 treesize of output 41 [2022-12-14 13:50:35,812 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:50:35,813 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 41 treesize of output 33 [2022-12-14 13:50:35,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:50:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:36,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584593533] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:50:36,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086993143] [2022-12-14 13:50:36,146 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:50:36,146 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:50:36,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:50:36,146 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:50:36,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:50:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,177 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:50:36,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:50:36,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,186 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 13:50:36,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:50:36,230 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:50:36,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,385 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:50:36,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 756 treesize of output 775 [2022-12-14 13:50:36,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:36,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:36,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 587 treesize of output 586 [2022-12-14 13:50:36,655 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:50:36,656 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 477 treesize of output 441 [2022-12-14 13:50:36,689 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 39 treesize of output 19 [2022-12-14 13:50:36,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:50:36,790 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 21 treesize of output 17 [2022-12-14 13:50:36,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:50:36,828 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 21 treesize of output 17 [2022-12-14 13:50:36,988 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:50:38,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9618#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:50:38,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:50:38,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:50:38,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 68 [2022-12-14 13:50:38,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423616544] [2022-12-14 13:50:38,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:50:38,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 13:50:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 13:50:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5438, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 13:50:38,092 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 68 states, 68 states have (on average 2.514705882352941) internal successors, (171), 68 states have internal predecessors, (171), 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 13:50:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:43,297 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2022-12-14 13:50:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 13:50:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.514705882352941) internal successors, (171), 68 states have internal predecessors, (171), 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 64 [2022-12-14 13:50:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:43,298 INFO L225 Difference]: With dead ends: 137 [2022-12-14 13:50:43,298 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 13:50:43,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4736 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1054, Invalid=18968, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 13:50:43,299 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 284 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:43,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 440 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 13:50:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 13:50:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 68. [2022-12-14 13:50:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 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 13:50:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-12-14 13:50:43,357 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2022-12-14 13:50:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:43,357 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-12-14 13:50:43,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.514705882352941) internal successors, (171), 68 states have internal predecessors, (171), 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 13:50:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-12-14 13:50:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 13:50:43,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:43,358 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:43,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 13:50:43,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:43,559 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:50:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1238205517, now seen corresponding path program 19 times [2022-12-14 13:50:43,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:43,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137143854] [2022-12-14 13:50:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:43,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 188 proven. 190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:50:44,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:44,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137143854] [2022-12-14 13:50:44,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137143854] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:50:44,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836179587] [2022-12-14 13:50:44,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:50:44,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:44,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:50:44,253 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:50:44,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:50:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:50:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:50:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 222 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:50:44,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:50:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 222 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:50:45,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836179587] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:50:45,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732244047] [2022-12-14 13:50:45,389 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:50:45,389 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:50:45,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:50:45,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:50:45,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:50:45,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,430 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:50:45,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:50:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,458 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:50:45,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:50:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:50:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:50:45,677 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:50:45,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:50:45,855 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:50:45,856 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 1022 treesize of output 968 [2022-12-14 13:50:45,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:45,867 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 953 treesize of output 929 [2022-12-14 13:50:46,266 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 21 treesize of output 17 [2022-12-14 13:50:46,272 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 19 treesize of output 15 [2022-12-14 13:50:46,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:50:46,318 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 21 treesize of output 17 [2022-12-14 13:50:46,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:50:47,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10537#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:50:47,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:50:47,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:50:47,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 64 [2022-12-14 13:50:47,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458171242] [2022-12-14 13:50:47,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:50:47,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 13:50:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 13:50:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=4181, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 13:50:47,317 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 64 states, 64 states have (on average 2.765625) internal successors, (177), 64 states have internal predecessors, (177), 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 13:50:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:50:47,954 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2022-12-14 13:50:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 13:50:47,955 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.765625) internal successors, (177), 64 states have internal predecessors, (177), 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 67 [2022-12-14 13:50:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:50:47,955 INFO L225 Difference]: With dead ends: 117 [2022-12-14 13:50:47,955 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 13:50:47,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3096 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1474, Invalid=6182, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 13:50:47,956 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:50:47,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 151 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:50:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 13:50:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-12-14 13:50:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 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 13:50:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-12-14 13:50:48,015 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2022-12-14 13:50:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:50:48,015 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-12-14 13:50:48,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.765625) internal successors, (177), 64 states have internal predecessors, (177), 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 13:50:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-12-14 13:50:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 13:50:48,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:50:48,015 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 13:50:48,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 13:50:48,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 13:50:48,216 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:50:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:50:48,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1127356804, now seen corresponding path program 20 times [2022-12-14 13:50:48,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:50:48,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573628356] [2022-12-14 13:50:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:50:48,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:50:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:50:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:50:49,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:50:49,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573628356] [2022-12-14 13:50:49,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573628356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:50:49,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13297730] [2022-12-14 13:50:49,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:50:49,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:50:49,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:50:49,369 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:50:49,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 13:50:50,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-14 13:50:50,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:50:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 13:50:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:50:51,145 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 13:50:51,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 13:50:51,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2022-12-14 13:50:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 445 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:50:52,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:50:52,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:52,162 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:50:52,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:52,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:50:52,188 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 112 treesize of output 98 [2022-12-14 13:50:52,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:50:52,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:50:52,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2022-12-14 13:50:52,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:52,204 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 91 treesize of output 88 [2022-12-14 13:50:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 3 proven. 442 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:50:52,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13297730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:50:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709368691] [2022-12-14 13:50:52,354 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:50:52,354 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:50:52,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:50:52,355 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:50:52,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:50:52,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,385 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:50:52,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:50:52,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,410 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:50:52,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:50:52,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:50:52,457 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:50:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,605 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:50:52,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 783 treesize of output 802 [2022-12-14 13:50:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:50:52,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:50:52,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 654 treesize of output 647 [2022-12-14 13:50:53,089 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:50:53,090 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 843 treesize of output 803 [2022-12-14 13:50:53,105 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 772 treesize of output 732 [2022-12-14 13:50:53,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:50:53,246 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 21 treesize of output 17 [2022-12-14 13:50:53,274 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 19 treesize of output 15 [2022-12-14 13:50:53,280 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 21 treesize of output 17 [2022-12-14 13:50:53,442 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:50:54,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11363#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:50:54,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:50:54,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:50:54,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31, 31] total 76 [2022-12-14 13:50:54,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616036388] [2022-12-14 13:50:54,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:50:54,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 13:50:54,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:50:54,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 13:50:54,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=6451, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 13:50:54,233 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 76 states have internal predecessors, (174), 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 13:51:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:02,869 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2022-12-14 13:51:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-14 13:51:02,869 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 76 states have internal predecessors, (174), 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 71 [2022-12-14 13:51:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:02,870 INFO L225 Difference]: With dead ends: 155 [2022-12-14 13:51:02,870 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 13:51:02,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11835 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2405, Invalid=31267, Unknown=0, NotChecked=0, Total=33672 [2022-12-14 13:51:02,871 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 468 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:02,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 403 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 13:51:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 13:51:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 75. [2022-12-14 13:51:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 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 13:51:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-12-14 13:51:02,939 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-12-14 13:51:02,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:02,939 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-12-14 13:51:02,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.289473684210526) internal successors, (174), 76 states have internal predecessors, (174), 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 13:51:02,940 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-12-14 13:51:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 13:51:02,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:02,940 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:02,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 13:51:03,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:03,141 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:51:03,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:03,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1562985721, now seen corresponding path program 21 times [2022-12-14 13:51:03,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:03,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819418696] [2022-12-14 13:51:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:03,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:51:03,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819418696] [2022-12-14 13:51:03,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819418696] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:51:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867640816] [2022-12-14 13:51:03,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:51:03,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:03,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:03,895 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:51:03,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 13:51:04,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:51:04,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:51:04,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 13:51:04,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:51:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:04,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:51:04,318 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 13:51:04,327 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 18 treesize of output 7 [2022-12-14 13:51:04,329 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 7 treesize of output 3 [2022-12-14 13:51:05,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:51:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:51:05,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:51:06,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:06,657 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 48 treesize of output 58 [2022-12-14 13:51:06,673 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 56 treesize of output 41 [2022-12-14 13:51:06,681 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:51:06,681 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 41 treesize of output 33 [2022-12-14 13:51:06,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:51:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:51:07,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867640816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:51:07,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765255411] [2022-12-14 13:51:07,081 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:51:07,081 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:51:07,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:51:07,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:51:07,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:51:07,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,107 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:51:07,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:51:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,139 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:51:07,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:51:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:51:07,187 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:51:07,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,316 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:51:07,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 761 treesize of output 780 [2022-12-14 13:51:07,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:07,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:07,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 668 treesize of output 661 [2022-12-14 13:51:07,580 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:51:07,580 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 843 treesize of output 811 [2022-12-14 13:51:07,601 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 772 treesize of output 732 [2022-12-14 13:51:07,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:51:07,906 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 21 treesize of output 17 [2022-12-14 13:51:07,932 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 21 treesize of output 17 [2022-12-14 13:51:07,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:51:08,078 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:51:09,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12445#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:51:09,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:51:09,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:51:09,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 77 [2022-12-14 13:51:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317228324] [2022-12-14 13:51:09,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:51:09,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 13:51:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 13:51:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6848, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 13:51:09,085 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 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 13:51:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:15,148 INFO L93 Difference]: Finished difference Result 157 states and 165 transitions. [2022-12-14 13:51:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 13:51:15,149 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 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 74 [2022-12-14 13:51:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:15,150 INFO L225 Difference]: With dead ends: 157 [2022-12-14 13:51:15,150 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 13:51:15,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6187 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1225, Invalid=24857, Unknown=0, NotChecked=0, Total=26082 [2022-12-14 13:51:15,151 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 3590 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:15,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 666 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3590 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 13:51:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 13:51:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 78. [2022-12-14 13:51:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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 13:51:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-12-14 13:51:15,229 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-12-14 13:51:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:15,229 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-12-14 13:51:15,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 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 13:51:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-12-14 13:51:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 13:51:15,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:15,230 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:15,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 13:51:15,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 13:51:15,431 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:51:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1172437340, now seen corresponding path program 22 times [2022-12-14 13:51:15,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:15,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768953554] [2022-12-14 13:51:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:15,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 261 proven. 257 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:51:16,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:16,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768953554] [2022-12-14 13:51:16,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768953554] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:51:16,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018145854] [2022-12-14 13:51:16,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:51:16,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:16,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:16,270 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:51:16,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 13:51:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 13:51:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:51:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 301 proven. 217 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:51:17,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:51:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 301 proven. 217 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:51:17,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018145854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:51:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131074579] [2022-12-14 13:51:17,814 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:51:17,814 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:51:17,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:51:17,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:51:17,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:51:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:17,840 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:51:17,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:51:17,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:17,867 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:51:17,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:51:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:17,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:51:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:17,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:51:18,041 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:51:18,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:51:18,395 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:51:18,395 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 1020 treesize of output 960 [2022-12-14 13:51:18,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:51:18,410 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 953 treesize of output 936 [2022-12-14 13:51:18,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:51:18,677 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 21 treesize of output 17 [2022-12-14 13:51:18,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:51:18,712 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 21 treesize of output 17 [2022-12-14 13:51:18,864 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:51:19,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13503#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:51:19,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:51:19,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:51:19,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25] total 73 [2022-12-14 13:51:19,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286504524] [2022-12-14 13:51:19,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:51:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 13:51:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 13:51:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1195, Invalid=5285, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 13:51:19,601 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 73 states, 73 states have (on average 2.7945205479452055) internal successors, (204), 73 states have internal predecessors, (204), 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 13:51:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:20,370 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2022-12-14 13:51:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 13:51:20,371 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.7945205479452055) internal successors, (204), 73 states have internal predecessors, (204), 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 77 [2022-12-14 13:51:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:20,371 INFO L225 Difference]: With dead ends: 133 [2022-12-14 13:51:20,371 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 13:51:20,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3993 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1878, Invalid=7824, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 13:51:20,372 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 113 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:20,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 153 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:51:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 13:51:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2022-12-14 13:51:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:51:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-12-14 13:51:20,449 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-12-14 13:51:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:20,449 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-12-14 13:51:20,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.7945205479452055) internal successors, (204), 73 states have internal predecessors, (204), 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 13:51:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-12-14 13:51:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 13:51:20,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:20,450 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:20,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 13:51:20,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 13:51:20,651 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:51:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash -615732021, now seen corresponding path program 23 times [2022-12-14 13:51:20,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:20,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838035190] [2022-12-14 13:51:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:20,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:51:21,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838035190] [2022-12-14 13:51:21,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838035190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:51:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138985522] [2022-12-14 13:51:21,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:51:21,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:21,741 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:51:21,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 13:51:23,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 13:51:23,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:51:23,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 13:51:23,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:51:24,047 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 39 treesize of output 50 [2022-12-14 13:51:24,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:51:24,062 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 26 treesize of output 15 [2022-12-14 13:51:24,064 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 15 treesize of output 5 [2022-12-14 13:51:24,111 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 59 treesize of output 67 [2022-12-14 13:51:24,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 13:51:24,124 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 8 treesize of output 1 [2022-12-14 13:51:24,131 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 15 treesize of output 5 [2022-12-14 13:51:25,779 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 13:51:25,779 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 59 treesize of output 38 [2022-12-14 13:51:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 3 proven. 591 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 13:51:25,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:51:26,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:51:26,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:26,552 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:51:26,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:26,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:51:26,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:51:26,588 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 17 treesize of output 9 [2022-12-14 13:51:26,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2022-12-14 13:51:26,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:26,596 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 91 treesize of output 88 [2022-12-14 13:51:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 13:51:26,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138985522] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:51:26,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [285334246] [2022-12-14 13:51:26,751 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:51:26,751 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:51:26,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:51:26,751 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:51:26,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:51:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:26,780 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:51:26,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:51:26,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:26,806 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:51:26,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:51:26,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:26,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:51:26,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:26,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:26,863 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 128 treesize of output 104 [2022-12-14 13:51:26,872 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 3 [2022-12-14 13:51:26,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:51:26,942 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 21 treesize of output 17 [2022-12-14 13:51:26,971 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 19 treesize of output 15 [2022-12-14 13:51:26,977 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 21 treesize of output 17 [2022-12-14 13:51:27,005 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 21 treesize of output 17 [2022-12-14 13:51:27,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:51:27,161 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:51:28,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14426#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:51:28,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:51:28,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:51:28,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 69 [2022-12-14 13:51:28,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086183688] [2022-12-14 13:51:28,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:51:28,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-14 13:51:28,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-14 13:51:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=5508, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 13:51:28,156 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 69 states, 69 states have (on average 2.5217391304347827) internal successors, (174), 69 states have internal predecessors, (174), 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 13:51:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:40,161 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2022-12-14 13:51:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-14 13:51:40,161 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.5217391304347827) internal successors, (174), 69 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-12-14 13:51:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:40,161 INFO L225 Difference]: With dead ends: 171 [2022-12-14 13:51:40,161 INFO L226 Difference]: Without dead ends: 169 [2022-12-14 13:51:40,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8935 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1863, Invalid=30717, Unknown=0, NotChecked=0, Total=32580 [2022-12-14 13:51:40,163 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 292 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 3368 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 3591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:40,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 631 Invalid, 3591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3368 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 13:51:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-14 13:51:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 85. [2022-12-14 13:51:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 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 13:51:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-12-14 13:51:40,246 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2022-12-14 13:51:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:40,246 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-12-14 13:51:40,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.5217391304347827) internal successors, (174), 69 states have internal predecessors, (174), 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 13:51:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-12-14 13:51:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 13:51:40,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:40,247 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:40,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 13:51:40,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 13:51:40,448 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:51:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash 537962570, now seen corresponding path program 24 times [2022-12-14 13:51:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:40,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442446755] [2022-12-14 13:51:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:40,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:51:41,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:41,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442446755] [2022-12-14 13:51:41,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442446755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:51:41,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674927302] [2022-12-14 13:51:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:51:41,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:41,349 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:51:41,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 13:51:41,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:51:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:51:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 13:51:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:51:41,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:41,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:51:41,919 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 13:51:41,931 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 13:51:41,932 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 13:51:43,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:51:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 638 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 13:51:43,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:51:44,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:44,540 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 2 case distinctions, treesize of input 48 treesize of output 58 [2022-12-14 13:51:44,556 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 56 treesize of output 41 [2022-12-14 13:51:44,562 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:51:44,562 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 41 treesize of output 33 [2022-12-14 13:51:44,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:51:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:51:45,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674927302] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:51:45,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318674977] [2022-12-14 13:51:45,148 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:51:45,148 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:51:45,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:51:45,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:51:45,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:51:45,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,179 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:51:45,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:51:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,188 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 13:51:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:51:45,244 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:51:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,385 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:51:45,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 779 treesize of output 798 [2022-12-14 13:51:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:51:45,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:51:45,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 660 treesize of output 651 [2022-12-14 13:51:45,598 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:51:45,598 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 494 treesize of output 466 [2022-12-14 13:51:45,608 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 39 treesize of output 19 [2022-12-14 13:51:45,803 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 21 treesize of output 17 [2022-12-14 13:51:45,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:51:45,839 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 21 treesize of output 17 [2022-12-14 13:51:45,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:51:46,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:51:47,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15630#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:51:47,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:51:47,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:51:47,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 30] total 87 [2022-12-14 13:51:47,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124702498] [2022-12-14 13:51:47,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:51:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-14 13:51:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:51:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-14 13:51:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=8604, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 13:51:47,114 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 87 states, 87 states have (on average 2.5977011494252875) internal successors, (226), 87 states have internal predecessors, (226), 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 13:51:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:51:58,596 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2022-12-14 13:51:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-12-14 13:51:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.5977011494252875) internal successors, (226), 87 states have internal predecessors, (226), 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 84 [2022-12-14 13:51:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:51:58,597 INFO L225 Difference]: With dead ends: 177 [2022-12-14 13:51:58,597 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 13:51:58,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9627 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1681, Invalid=36931, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 13:51:58,599 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 366 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 4362 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 4488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:51:58,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 735 Invalid, 4488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 4362 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 13:51:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 13:51:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 88. [2022-12-14 13:51:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 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 13:51:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-12-14 13:51:58,702 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2022-12-14 13:51:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:51:58,702 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-12-14 13:51:58,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.5977011494252875) internal successors, (226), 87 states have internal predecessors, (226), 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 13:51:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-12-14 13:51:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 13:51:58,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:51:58,702 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 13:51:58,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 13:51:58,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 13:51:58,904 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:51:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:51:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1925220459, now seen corresponding path program 25 times [2022-12-14 13:51:58,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:51:58,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031865085] [2022-12-14 13:51:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:51:58,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:51:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:51:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 346 proven. 334 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:51:59,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:51:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031865085] [2022-12-14 13:51:59,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031865085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:51:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082143777] [2022-12-14 13:51:59,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:51:59,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:51:59,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:59,861 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:51:59,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 13:52:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 13:52:00,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:52:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 392 proven. 288 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:52:00,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:52:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 392 proven. 288 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:52:01,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082143777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:52:01,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971910135] [2022-12-14 13:52:01,564 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:52:01,564 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:52:01,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:52:01,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:52:01,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:52:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:01,592 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:52:01,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:52:01,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:01,620 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:52:01,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:52:01,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:01,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:52:01,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:01,672 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 139 treesize of output 113 [2022-12-14 13:52:01,680 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 3 [2022-12-14 13:52:01,737 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 21 treesize of output 17 [2022-12-14 13:52:01,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:52:01,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:52:01,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 13:52:01,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:52:01,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 13:52:01,969 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:52:02,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16855#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:52:02,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:52:02,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:52:02,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 82 [2022-12-14 13:52:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688250175] [2022-12-14 13:52:02,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:52:02,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-14 13:52:02,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:52:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-14 13:52:02,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=6517, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 13:52:02,800 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 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 13:52:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:03,734 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2022-12-14 13:52:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 13:52:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 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 87 [2022-12-14 13:52:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:03,735 INFO L225 Difference]: With dead ends: 149 [2022-12-14 13:52:03,735 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 13:52:03,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5002 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2332, Invalid=9658, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 13:52:03,736 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 177 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:03,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 178 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:52:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 13:52:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2022-12-14 13:52:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 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 13:52:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-12-14 13:52:03,839 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2022-12-14 13:52:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:52:03,839 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-12-14 13:52:03,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 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 13:52:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-12-14 13:52:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 13:52:03,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:03,840 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 13:52:03,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 13:52:04,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 13:52:04,041 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:52:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1137769754, now seen corresponding path program 26 times [2022-12-14 13:52:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:04,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601327621] [2022-12-14 13:52:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:04,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 764 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:52:05,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:05,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601327621] [2022-12-14 13:52:05,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601327621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:52:05,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192132574] [2022-12-14 13:52:05,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:52:05,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:52:05,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:52:05,200 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:52:05,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 13:52:08,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 13:52:08,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:52:08,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-14 13:52:08,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:52:08,305 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 39 treesize of output 50 [2022-12-14 13:52:08,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:52:08,314 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 8 treesize of output 1 [2022-12-14 13:52:08,325 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 15 treesize of output 5 [2022-12-14 13:52:08,379 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 59 treesize of output 67 [2022-12-14 13:52:08,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 13:52:08,391 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 8 treesize of output 1 [2022-12-14 13:52:08,407 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 28 treesize of output 9 [2022-12-14 13:52:10,618 INFO L321 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-12-14 13:52:10,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 41 [2022-12-14 13:52:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 1 proven. 763 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:52:10,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:52:11,540 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 17 treesize of output 9 [2022-12-14 13:52:11,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:52:11,607 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:52:11,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:52:11,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:52:11,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-12-14 13:52:11,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:52:11,640 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 72 treesize of output 64 [2022-12-14 13:52:11,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:52:11,646 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 100 treesize of output 97 [2022-12-14 13:52:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 764 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:52:11,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192132574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:52:11,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320653833] [2022-12-14 13:52:11,778 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:52:11,778 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:52:11,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:52:11,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:52:11,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:52:11,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:11,807 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:52:11,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:52:11,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:11,817 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 13:52:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:11,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:52:11,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:11,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:11,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:11,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:11,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:11,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:52:11,976 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:52:11,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:52:12,085 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:52:12,085 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 1022 treesize of output 992 [2022-12-14 13:52:12,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:12,101 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 953 treesize of output 929 [2022-12-14 13:52:12,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:52:12,547 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 21 treesize of output 17 [2022-12-14 13:52:12,587 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 21 treesize of output 17 [2022-12-14 13:52:12,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:52:12,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:52:14,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17889#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:52:14,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:52:14,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:52:14,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 76 [2022-12-14 13:52:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529390822] [2022-12-14 13:52:14,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:52:14,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 13:52:14,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:52:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 13:52:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=6576, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 13:52:14,122 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 76 states, 76 states have (on average 2.513157894736842) internal successors, (191), 76 states have internal predecessors, (191), 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 13:52:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:30,063 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2022-12-14 13:52:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-12-14 13:52:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.513157894736842) internal successors, (191), 76 states have internal predecessors, (191), 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 91 [2022-12-14 13:52:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:30,064 INFO L225 Difference]: With dead ends: 194 [2022-12-14 13:52:30,064 INFO L226 Difference]: Without dead ends: 192 [2022-12-14 13:52:30,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12349 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=2250, Invalid=39980, Unknown=0, NotChecked=0, Total=42230 [2022-12-14 13:52:30,065 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 419 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 4160 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 4369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 4160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:30,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 688 Invalid, 4369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 4160 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 13:52:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-14 13:52:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 102. [2022-12-14 13:52:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 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 13:52:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2022-12-14 13:52:30,190 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 91 [2022-12-14 13:52:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:52:30,190 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2022-12-14 13:52:30,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.513157894736842) internal successors, (191), 76 states have internal predecessors, (191), 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 13:52:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2022-12-14 13:52:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 13:52:30,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:30,191 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 13:52:30,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 13:52:30,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:52:30,392 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:52:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1378541190, now seen corresponding path program 27 times [2022-12-14 13:52:30,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:30,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022457205] [2022-12-14 13:52:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:30,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 443 proven. 421 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:52:31,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:31,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022457205] [2022-12-14 13:52:31,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022457205] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:52:31,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546232102] [2022-12-14 13:52:31,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:52:31,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:52:31,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:52:31,484 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:52:31,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 13:52:31,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:52:31,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:52:31,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:52:31,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:52:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 495 proven. 369 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:52:32,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:52:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 495 proven. 369 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:52:33,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546232102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:52:33,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [833255223] [2022-12-14 13:52:33,626 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:52:33,626 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:52:33,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:52:33,627 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:52:33,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:52:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,656 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:52:33,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:52:33,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,663 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 13:52:33,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:52:33,704 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:52:33,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,844 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:52:33,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 790 treesize of output 809 [2022-12-14 13:52:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:52:33,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:52:33,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 639 treesize of output 632 [2022-12-14 13:52:33,998 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:52:33,998 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 482 treesize of output 452 [2022-12-14 13:52:34,007 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 413 treesize of output 383 [2022-12-14 13:52:34,192 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 19 treesize of output 15 [2022-12-14 13:52:34,198 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 21 treesize of output 17 [2022-12-14 13:52:34,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:52:34,239 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 21 treesize of output 17 [2022-12-14 13:52:34,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:52:35,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19274#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:52:35,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:52:35,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:52:35,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 90 [2022-12-14 13:52:35,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51247146] [2022-12-14 13:52:35,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:52:35,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-14 13:52:35,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:52:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-14 13:52:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=7902, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 13:52:35,359 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 90 states, 90 states have (on average 2.8555555555555556) internal successors, (257), 90 states have internal predecessors, (257), 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 13:52:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:37,378 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2022-12-14 13:52:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 13:52:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.8555555555555556) internal successors, (257), 90 states have internal predecessors, (257), 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 97 [2022-12-14 13:52:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:37,379 INFO L225 Difference]: With dead ends: 162 [2022-12-14 13:52:37,380 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 13:52:37,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6168 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3239, Invalid=15393, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 13:52:37,381 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 188 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:37,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 208 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:52:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 13:52:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-12-14 13:52:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 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 13:52:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-12-14 13:52:37,503 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 97 [2022-12-14 13:52:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:52:37,503 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-12-14 13:52:37,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.8555555555555556) internal successors, (257), 90 states have internal predecessors, (257), 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 13:52:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-12-14 13:52:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 13:52:37,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:37,504 INFO L195 NwaCegarLoop]: trace histogram [20, 18, 17, 17, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 13:52:37,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 13:52:37,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 13:52:37,705 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:52:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash -977208820, now seen corresponding path program 28 times [2022-12-14 13:52:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:37,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246359821] [2022-12-14 13:52:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 908 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:52:39,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:39,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246359821] [2022-12-14 13:52:39,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246359821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:52:39,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688014521] [2022-12-14 13:52:39,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:52:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:52:39,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:52:39,361 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:52:39,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 13:52:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 87 conjunts are in the unsatisfiable core [2022-12-14 13:52:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:52:39,763 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 34 treesize of output 45 [2022-12-14 13:52:39,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-12-14 13:52:39,929 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-14 13:52:39,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 13:52:39,981 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-12-14 13:52:39,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-12-14 13:52:53,501 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-12-14 13:52:53,502 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 40 treesize of output 17 [2022-12-14 13:52:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 1 proven. 907 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:52:53,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:52:54,190 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 13:52:54,260 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 28 treesize of output 24 [2022-12-14 13:53:36,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:53:36,635 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:53:36,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:53:36,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:53:36,653 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 46 treesize of output 34 [2022-12-14 13:53:36,660 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 13:53:36,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:53:36,666 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 33 treesize of output 30 [2022-12-14 13:53:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 1 proven. 907 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:53:36,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688014521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:53:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860913841] [2022-12-14 13:53:36,984 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:53:36,984 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:53:36,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:53:36,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:53:36,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:53:36,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,012 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:53:37,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:53:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,020 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 13:53:37,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:53:37,066 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:53:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,206 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:53:37,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 801 treesize of output 820 [2022-12-14 13:53:37,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:53:37,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:53:37,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 632 treesize of output 625 [2022-12-14 13:53:37,612 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:53:37,613 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 860 treesize of output 810 [2022-12-14 13:53:37,626 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 789 treesize of output 749 [2022-12-14 13:53:37,854 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 21 treesize of output 17 [2022-12-14 13:53:37,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:53:37,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:53:37,904 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 21 treesize of output 17 [2022-12-14 13:53:38,064 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:53:39,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20432#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:53:39,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:53:39,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:53:39,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 37] total 88 [2022-12-14 13:53:39,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468321631] [2022-12-14 13:53:39,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:53:39,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-12-14 13:53:39,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:53:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-12-14 13:53:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=8699, Unknown=8, NotChecked=0, Total=9120 [2022-12-14 13:53:39,160 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 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 13:53:42,874 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 13:55:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:02,462 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2022-12-14 13:55:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-14 13:55:02,463 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 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 98 [2022-12-14 13:55:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:02,463 INFO L225 Difference]: With dead ends: 137 [2022-12-14 13:55:02,463 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 13:55:02,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 231 SyntacticMatches, 5 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8221 ImplicationChecksByTransitivity, 135.9s TimeCoverageRelationStatistics Valid=1829, Invalid=31094, Unknown=19, NotChecked=0, Total=32942 [2022-12-14 13:55:02,465 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 411 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 5742 mSolverCounterSat, 253 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 5996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 5742 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:02,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 949 Invalid, 5996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 5742 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-12-14 13:55:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 13:55:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2022-12-14 13:55:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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 13:55:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-12-14 13:55:02,602 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2022-12-14 13:55:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:02,602 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-12-14 13:55:02,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 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 13:55:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-12-14 13:55:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 13:55:02,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:02,603 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 18, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:02,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 13:55:02,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:02,804 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:55:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash -734345367, now seen corresponding path program 29 times [2022-12-14 13:55:02,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:55:02,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121829764] [2022-12-14 13:55:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:02,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:55:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 958 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:55:04,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:55:04,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121829764] [2022-12-14 13:55:04,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121829764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:55:04,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239591592] [2022-12-14 13:55:04,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:55:04,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:04,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:55:04,278 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:55:04,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 13:55:11,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-12-14 13:55:11,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:55:11,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-14 13:55:11,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:11,902 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:55:11,905 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 21 treesize of output 17 [2022-12-14 13:55:11,954 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 29 treesize of output 28 [2022-12-14 13:55:12,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2022-12-14 13:55:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:55:12,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:13,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:55:13,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:55:13,921 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:55:13,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:55:13,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:55:13,945 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 112 treesize of output 98 [2022-12-14 13:55:13,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:55:13,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:55:13,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2022-12-14 13:55:13,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:55:13,964 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 91 treesize of output 88 [2022-12-14 13:55:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 3 proven. 958 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:55:14,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239591592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543346672] [2022-12-14 13:55:14,256 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:55:14,257 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:55:14,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:55:14,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:55:14,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:55:14,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,291 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:55:14,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:55:14,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,322 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:55:14,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:55:14,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:55:14,383 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:55:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,534 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:55:14,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 756 treesize of output 775 [2022-12-14 13:55:14,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:14,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:55:14,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 601 treesize of output 598 [2022-12-14 13:55:14,762 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:55:14,762 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 482 treesize of output 448 [2022-12-14 13:55:14,778 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 413 treesize of output 383 [2022-12-14 13:55:14,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:55:14,977 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 21 treesize of output 17 [2022-12-14 13:55:15,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:55:15,016 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 21 treesize of output 17 [2022-12-14 13:55:15,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:55:16,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21689#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:55:16,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:55:16,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:55:16,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 40, 40] total 86 [2022-12-14 13:55:16,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929884964] [2022-12-14 13:55:16,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:55:16,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-14 13:55:16,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:55:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-14 13:55:16,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=8283, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 13:55:16,333 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 86 states, 86 states have (on average 2.5) internal successors, (215), 86 states have internal predecessors, (215), 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 13:55:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:31,670 INFO L93 Difference]: Finished difference Result 211 states and 222 transitions. [2022-12-14 13:55:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-12-14 13:55:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.5) internal successors, (215), 86 states have internal predecessors, (215), 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 101 [2022-12-14 13:55:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:31,671 INFO L225 Difference]: With dead ends: 211 [2022-12-14 13:55:31,671 INFO L226 Difference]: Without dead ends: 209 [2022-12-14 13:55:31,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15258 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=2559, Invalid=47841, Unknown=0, NotChecked=0, Total=50400 [2022-12-14 13:55:31,673 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 524 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 4687 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 4994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 4687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:31,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 786 Invalid, 4994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 4687 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 13:55:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-12-14 13:55:31,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 105. [2022-12-14 13:55:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 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 13:55:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-12-14 13:55:31,813 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2022-12-14 13:55:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:31,813 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-12-14 13:55:31,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.5) internal successors, (215), 86 states have internal predecessors, (215), 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 13:55:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-12-14 13:55:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 13:55:31,813 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:31,814 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:31,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 13:55:32,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:32,015 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:55:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1685856492, now seen corresponding path program 30 times [2022-12-14 13:55:32,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:55:32,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403190303] [2022-12-14 13:55:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:32,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:55:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 1014 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:55:33,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:55:33,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403190303] [2022-12-14 13:55:33,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403190303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:55:33,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421841687] [2022-12-14 13:55:33,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:55:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:55:33,374 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:55:33,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 13:55:33,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:55:33,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:55:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-14 13:55:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:34,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:55:34,086 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 13:55:34,089 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 13:55:34,100 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 13:55:35,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:55:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 1 proven. 1016 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:55:35,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:37,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:55:37,772 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 48 treesize of output 58 [2022-12-14 13:55:37,790 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 56 treesize of output 41 [2022-12-14 13:55:37,797 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:55:37,797 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 41 treesize of output 33 [2022-12-14 13:55:37,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:55:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 3 proven. 1014 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:55:38,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421841687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:38,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662806270] [2022-12-14 13:55:38,552 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:55:38,552 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:55:38,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:55:38,552 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:55:38,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:55:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,580 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:55:38,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:55:38,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,610 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:55:38,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:55:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:55:38,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:55:38,779 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:55:38,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:55:38,901 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:55:38,901 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 591 treesize of output 565 [2022-12-14 13:55:38,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:38,917 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 522 treesize of output 498 [2022-12-14 13:55:39,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:55:39,122 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 21 treesize of output 17 [2022-12-14 13:55:39,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 13:55:39,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:55:39,320 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:55:40,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23184#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:55:40,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:55:40,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:55:40,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 108 [2022-12-14 13:55:40,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572285842] [2022-12-14 13:55:40,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:55:40,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-12-14 13:55:40,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:55:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-12-14 13:55:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=12926, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 13:55:40,485 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 108 states, 108 states have (on average 2.6018518518518516) internal successors, (281), 108 states have internal predecessors, (281), 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 13:55:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:54,534 INFO L93 Difference]: Finished difference Result 217 states and 228 transitions. [2022-12-14 13:55:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-12-14 13:55:54,535 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.6018518518518516) internal successors, (281), 108 states have internal predecessors, (281), 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 104 [2022-12-14 13:55:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:54,536 INFO L225 Difference]: With dead ends: 217 [2022-12-14 13:55:54,536 INFO L226 Difference]: Without dead ends: 215 [2022-12-14 13:55:54,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14837 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1995, Invalid=56811, Unknown=0, NotChecked=0, Total=58806 [2022-12-14 13:55:54,540 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 430 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 6510 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 6660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 6510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:54,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1239 Invalid, 6660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 6510 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 13:55:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-14 13:55:54,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 108. [2022-12-14 13:55:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 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 13:55:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-12-14 13:55:54,692 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2022-12-14 13:55:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:54,692 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-12-14 13:55:54,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.6018518518518516) internal successors, (281), 108 states have internal predecessors, (281), 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 13:55:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-12-14 13:55:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 13:55:54,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:54,693 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:54,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 13:55:54,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 13:55:54,894 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:55:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:54,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1991527287, now seen corresponding path program 31 times [2022-12-14 13:55:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:55:54,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263805263] [2022-12-14 13:55:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:54,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:55:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 552 proven. 518 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:55:56,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:55:56,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263805263] [2022-12-14 13:55:56,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263805263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:55:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080224704] [2022-12-14 13:55:56,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:55:56,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:56,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:55:56,258 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:55:56,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 13:55:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:56,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 13:55:56,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 610 proven. 460 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:55:57,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 610 proven. 460 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:55:58,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080224704] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269004212] [2022-12-14 13:55:58,877 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:55:58,877 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:55:58,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:55:58,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:55:58,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:55:58,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:58,911 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:55:58,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:55:58,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:58,920 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 13:55:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:58,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:55:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:55:59,103 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:55:59,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:55:59,209 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:55:59,209 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 1022 treesize of output 978 [2022-12-14 13:55:59,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:55:59,222 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 955 treesize of output 938 [2022-12-14 13:55:59,626 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 21 treesize of output 17 [2022-12-14 13:55:59,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:55:59,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:55:59,673 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 21 treesize of output 17 [2022-12-14 13:55:59,844 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:56:00,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24693#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:56:00,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:56:00,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:56:00,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 34] total 100 [2022-12-14 13:56:00,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490820805] [2022-12-14 13:56:00,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:56:00,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-12-14 13:56:00,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:56:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-12-14 13:56:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2191, Invalid=9365, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 13:56:00,821 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 100 states, 100 states have (on average 2.85) internal successors, (285), 100 states have internal predecessors, (285), 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 13:56:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:56:02,033 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2022-12-14 13:56:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 13:56:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.85) internal successors, (285), 100 states have internal predecessors, (285), 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 107 [2022-12-14 13:56:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:56:02,034 INFO L225 Difference]: With dead ends: 181 [2022-12-14 13:56:02,034 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 13:56:02,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7356 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3390, Invalid=13902, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 13:56:02,035 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 227 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:56:02,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 258 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:56:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 13:56:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2022-12-14 13:56:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 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 13:56:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-12-14 13:56:02,193 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2022-12-14 13:56:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:56:02,193 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-12-14 13:56:02,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.85) internal successors, (285), 100 states have internal predecessors, (285), 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 13:56:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-12-14 13:56:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 13:56:02,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:56:02,193 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 20, 11, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 13:56:02,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 13:56:02,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:56:02,394 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:56:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:56:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash 506067896, now seen corresponding path program 32 times [2022-12-14 13:56:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:56:02,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865681987] [2022-12-14 13:56:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:56:02,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:56:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:56:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 0 proven. 1174 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:56:04,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:56:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865681987] [2022-12-14 13:56:04,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865681987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:56:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528110740] [2022-12-14 13:56:04,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:56:04,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:56:04,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:56:04,294 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:56:04,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 13:56:20,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-12-14 13:56:20,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:56:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-14 13:56:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:20,484 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 39 treesize of output 50 [2022-12-14 13:56:20,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:56:20,493 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 8 treesize of output 1 [2022-12-14 13:56:20,503 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 15 treesize of output 5 [2022-12-14 13:56:20,579 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 59 treesize of output 67 [2022-12-14 13:56:20,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 13:56:20,604 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 26 treesize of output 15 [2022-12-14 13:56:20,607 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 15 treesize of output 5 [2022-12-14 13:56:23,035 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 13:56:23,036 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 59 treesize of output 38 [2022-12-14 13:56:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 5 proven. 1173 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:56:23,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:24,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:56:24,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:56:24,292 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:56:24,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:56:24,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:56:24,318 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 112 treesize of output 98 [2022-12-14 13:56:24,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 108 [2022-12-14 13:56:24,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:56:24,329 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 136 treesize of output 133 [2022-12-14 13:56:24,332 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 142 treesize of output 134 [2022-12-14 13:56:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 0 proven. 1178 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:56:24,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528110740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:24,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424548259] [2022-12-14 13:56:24,597 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:56:24,597 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:56:24,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:56:24,597 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:56:24,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:56:24,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:24,629 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:56:24,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:56:24,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:24,661 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:56:24,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:56:24,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:24,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:56:24,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:24,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:24,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:56:24,824 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:56:24,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:56:25,149 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:56:25,150 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 1020 treesize of output 990 [2022-12-14 13:56:25,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:56:25,165 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 951 treesize of output 927 [2022-12-14 13:56:25,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:56:25,382 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 21 treesize of output 17 [2022-12-14 13:56:25,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:56:25,412 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 21 treesize of output 17 [2022-12-14 13:56:25,561 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:56:26,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25951#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:56:26,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:56:26,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:56:26,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 41, 41] total 92 [2022-12-14 13:56:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027300820] [2022-12-14 13:56:26,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:56:26,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-12-14 13:56:26,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:56:26,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-12-14 13:56:26,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=9450, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 13:56:26,760 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 92 states, 92 states have (on average 2.619565217391304) internal successors, (241), 92 states have internal predecessors, (241), 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 13:56:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:56:48,618 INFO L93 Difference]: Finished difference Result 231 states and 243 transitions. [2022-12-14 13:56:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-12-14 13:56:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.619565217391304) internal successors, (241), 92 states have internal predecessors, (241), 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 111 [2022-12-14 13:56:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:56:48,619 INFO L225 Difference]: With dead ends: 231 [2022-12-14 13:56:48,619 INFO L226 Difference]: Without dead ends: 229 [2022-12-14 13:56:48,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 270 SyntacticMatches, 3 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16302 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=2549, Invalid=56257, Unknown=0, NotChecked=0, Total=58806 [2022-12-14 13:56:48,623 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 386 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 6366 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 6679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 6366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:56:48,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1174 Invalid, 6679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 6366 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 13:56:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-14 13:56:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 115. [2022-12-14 13:56:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 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 13:56:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-12-14 13:56:48,800 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 111 [2022-12-14 13:56:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:56:48,801 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-12-14 13:56:48,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.619565217391304) internal successors, (241), 92 states have internal predecessors, (241), 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 13:56:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-12-14 13:56:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 13:56:48,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:56:48,801 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 11, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 13:56:48,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 13:56:49,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 13:56:49,002 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:56:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:56:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 938759741, now seen corresponding path program 33 times [2022-12-14 13:56:49,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:56:49,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889409464] [2022-12-14 13:56:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:56:49,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:56:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:56:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 0 proven. 1236 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:56:50,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:56:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889409464] [2022-12-14 13:56:50,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889409464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:56:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745896342] [2022-12-14 13:56:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:56:50,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:56:50,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:56:50,277 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:56:50,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 13:56:50,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:56:50,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:56:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 13:56:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:51,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:51,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:56:51,045 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 13:56:51,056 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 13:56:51,058 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 13:56:53,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:56:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 0 proven. 1236 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:56:53,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:54,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:56:54,998 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 48 treesize of output 58 [2022-12-14 13:56:55,022 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:56:55,022 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 43 treesize of output 39 [2022-12-14 13:56:55,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:56:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 0 proven. 1236 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:56:56,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745896342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:56,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486492912] [2022-12-14 13:56:56,064 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:56:56,064 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:56:56,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:56:56,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:56:56,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:56:56,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:56,098 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:56:56,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:56:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:56,108 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 13:56:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:56,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:56:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:56,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:56:56,171 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 103 [2022-12-14 13:56:56,181 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 3 [2022-12-14 13:56:56,241 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 21 treesize of output 17 [2022-12-14 13:56:56,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:56:56,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:56:56,284 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 21 treesize of output 17 [2022-12-14 13:56:56,322 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 21 treesize of output 17 [2022-12-14 13:56:56,329 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 19 treesize of output 15 [2022-12-14 13:56:56,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:56:57,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27583#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:56:57,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:56:57,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:56:57,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 113 [2022-12-14 13:56:57,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984483486] [2022-12-14 13:56:57,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:56:57,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-12-14 13:56:57,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:56:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-12-14 13:56:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=14103, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 13:56:57,982 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 113 states, 113 states have (on average 2.7079646017699117) internal successors, (306), 113 states have internal predecessors, (306), 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 13:57:11,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:57:11,632 INFO L93 Difference]: Finished difference Result 237 states and 249 transitions. [2022-12-14 13:57:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-12-14 13:57:11,632 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.7079646017699117) internal successors, (306), 113 states have internal predecessors, (306), 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 114 [2022-12-14 13:57:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:57:11,633 INFO L225 Difference]: With dead ends: 237 [2022-12-14 13:57:11,634 INFO L226 Difference]: Without dead ends: 235 [2022-12-14 13:57:11,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13286 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1824, Invalid=54108, Unknown=0, NotChecked=0, Total=55932 [2022-12-14 13:57:11,636 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 459 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 7113 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 7228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 7113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:57:11,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1333 Invalid, 7228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 7113 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 13:57:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-12-14 13:57:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 118. [2022-12-14 13:57:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 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 13:57:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-12-14 13:57:11,810 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2022-12-14 13:57:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:57:11,810 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-12-14 13:57:11,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.7079646017699117) internal successors, (306), 113 states have internal predecessors, (306), 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 13:57:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-12-14 13:57:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 13:57:11,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:57:11,810 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 11, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 13:57:11,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 13:57:12,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 13:57:12,012 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:57:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:57:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2064658840, now seen corresponding path program 34 times [2022-12-14 13:57:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:57:12,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417841495] [2022-12-14 13:57:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:57:12,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:57:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:57:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 673 proven. 625 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:57:13,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:57:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417841495] [2022-12-14 13:57:13,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417841495] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:57:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312555481] [2022-12-14 13:57:13,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:57:13,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:57:13,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:57:13,668 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:57:13,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 13:57:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:57:13,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 13:57:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:57:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 737 proven. 561 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:57:15,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:57:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 737 proven. 561 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:57:16,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312555481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:57:16,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746831064] [2022-12-14 13:57:16,923 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:57:16,924 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:57:16,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:57:16,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:57:16,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:57:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:16,953 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 13:57:16,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 13:57:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:16,980 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:57:16,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:57:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:17,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:57:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:17,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:17,030 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 114 treesize of output 94 [2022-12-14 13:57:17,039 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 3 [2022-12-14 13:57:17,096 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 21 treesize of output 17 [2022-12-14 13:57:17,101 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 19 treesize of output 15 [2022-12-14 13:57:17,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:57:17,147 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 21 treesize of output 17 [2022-12-14 13:57:17,175 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 21 treesize of output 17 [2022-12-14 13:57:17,180 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 19 treesize of output 15 [2022-12-14 13:57:17,340 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:57:18,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29187#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:57:18,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:57:18,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:57:18,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 37] total 109 [2022-12-14 13:57:18,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141223339] [2022-12-14 13:57:18,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:57:18,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-12-14 13:57:18,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:57:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-12-14 13:57:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2591, Invalid=10981, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 13:57:18,555 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 109 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 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 13:57:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:57:20,102 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2022-12-14 13:57:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 13:57:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 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 117 [2022-12-14 13:57:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:57:20,103 INFO L225 Difference]: With dead ends: 197 [2022-12-14 13:57:20,103 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 13:57:20,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8701 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3994, Invalid=16312, Unknown=0, NotChecked=0, Total=20306 [2022-12-14 13:57:20,104 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 241 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:57:20,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 324 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:57:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 13:57:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-12-14 13:57:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 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 13:57:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-12-14 13:57:20,294 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 117 [2022-12-14 13:57:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:57:20,294 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-12-14 13:57:20,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 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 13:57:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-12-14 13:57:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 13:57:20,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:57:20,294 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 22, 22, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 13:57:20,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 13:57:20,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 13:57:20,495 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:57:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:57:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash -704738809, now seen corresponding path program 35 times [2022-12-14 13:57:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:57:20,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533071729] [2022-12-14 13:57:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:57:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:57:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:57:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 1412 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:57:22,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:57:22,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533071729] [2022-12-14 13:57:22,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533071729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:57:22,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395659482] [2022-12-14 13:57:22,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:57:22,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:57:22,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:57:22,405 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:57:22,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 13:57:40,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-12-14 13:57:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:57:40,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 13:57:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:57:40,827 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 34 treesize of output 45 [2022-12-14 13:57:40,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-12-14 13:57:40,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 12 [2022-12-14 13:57:40,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-12-14 13:57:41,040 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 55 treesize of output 63 [2022-12-14 13:57:41,055 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-12-14 13:57:41,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 44 [2022-12-14 13:57:41,079 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 51 treesize of output 39 [2022-12-14 13:57:41,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:41,083 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 39 treesize of output 19 [2022-12-14 13:57:41,222 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 90 treesize of output 96 [2022-12-14 13:57:41,240 INFO L321 Elim1Store]: treesize reduction 41, result has 37.9 percent of original size [2022-12-14 13:57:41,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 86 [2022-12-14 13:57:41,279 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 8 treesize of output 1 [2022-12-14 13:57:41,314 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 15 treesize of output 5 [2022-12-14 13:57:41,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:57:41,321 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 44 treesize of output 38 [2022-12-14 13:57:45,922 INFO L321 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2022-12-14 13:57:45,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 41 [2022-12-14 13:57:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 4 proven. 1412 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 13:57:45,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:57:47,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 13:57:47,925 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 67 treesize of output 59 [2022-12-14 13:57:48,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:57:48,523 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 13:57:48,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:57:48,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 13:57:48,590 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 141 treesize of output 121 [2022-12-14 13:57:48,593 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 4 [2022-12-14 13:57:48,596 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 4 [2022-12-14 13:57:48,602 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-12-14 13:57:48,603 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 184 treesize of output 167 [2022-12-14 13:57:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 1417 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:57:48,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395659482] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:57:48,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414799889] [2022-12-14 13:57:48,906 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:57:48,906 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:57:48,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:57:48,906 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:57:48,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:57:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:48,934 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:57:48,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:57:48,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:48,942 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 13:57:48,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:48,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:48,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 13:57:48,985 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:57:49,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,137 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 13:57:49,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 745 treesize of output 764 [2022-12-14 13:57:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:57:49,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:57:49,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 594 treesize of output 593 [2022-12-14 13:57:49,334 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:57:49,335 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 843 treesize of output 799 [2022-12-14 13:57:49,409 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 21 [2022-12-14 13:57:49,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:57:49,744 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 21 treesize of output 17 [2022-12-14 13:57:49,777 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 21 treesize of output 17 [2022-12-14 13:57:49,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:57:49,925 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:57:51,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30561#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 13:57:51,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:57:51,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:57:51,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 45, 46] total 104 [2022-12-14 13:57:51,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789943519] [2022-12-14 13:57:51,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:57:51,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-12-14 13:57:51,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:57:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-12-14 13:57:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=11839, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 13:57:51,336 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 104 states, 104 states have (on average 2.5384615384615383) internal successors, (264), 104 states have internal predecessors, (264), 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 13:58:00,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 13:58:14,047 WARN L539 Checker$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 13:58:18,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:58:23,010 WARN L539 Checker$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 13:58:27,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:58:31,948 WARN L539 Checker$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 13:58:36,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:58:41,247 WARN L539 Checker$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 13:58:50,142 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 92 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:58:58,961 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 89 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:59:01,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 13:59:12,710 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 77 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:59:18,229 WARN L539 Checker$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 13:59:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:48,501 INFO L93 Difference]: Finished difference Result 247 states and 259 transitions. [2022-12-14 13:59:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-12-14 13:59:48,501 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.5384615384615383) internal successors, (264), 104 states have internal predecessors, (264), 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 121 [2022-12-14 13:59:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:48,503 INFO L225 Difference]: With dead ends: 247 [2022-12-14 13:59:48,503 INFO L226 Difference]: Without dead ends: 245 [2022-12-14 13:59:48,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 291 SyntacticMatches, 3 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23744 ImplicationChecksByTransitivity, 98.7s TimeCoverageRelationStatistics Valid=3447, Invalid=75786, Unknown=9, NotChecked=0, Total=79242 [2022-12-14 13:59:48,506 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 577 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 7380 mSolverCounterSat, 458 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 7848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 7380 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:48,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1259 Invalid, 7848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 7380 Invalid, 10 Unknown, 0 Unchecked, 25.4s Time] [2022-12-14 13:59:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-12-14 13:59:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 125. [2022-12-14 13:59:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 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 13:59:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-12-14 13:59:48,712 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2022-12-14 13:59:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:48,712 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-12-14 13:59:48,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.5384615384615383) internal successors, (264), 104 states have internal predecessors, (264), 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 13:59:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-12-14 13:59:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 13:59:48,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:48,713 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 13:59:48,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 13:59:48,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 13:59:48,914 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1068437106, now seen corresponding path program 36 times [2022-12-14 13:59:48,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:48,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830262284] [2022-12-14 13:59:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1480 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:59:50,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830262284] [2022-12-14 13:59:50,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830262284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:50,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284843724] [2022-12-14 13:59:50,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:59:50,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:50,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:50,586 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:50,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 13:59:50,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:59:50,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:59:50,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 13:59:50,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:51,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:51,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:59:51,565 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 13:59:51,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-12-14 13:59:51,575 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 13:59:54,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 13:59:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 13:59:54,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:59:57,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:59:57,382 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 48 treesize of output 58 [2022-12-14 13:59:57,400 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 56 treesize of output 41 [2022-12-14 13:59:57,408 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 13:59:57,409 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 41 treesize of output 33 [2022-12-14 13:59:57,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 13:59:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1480 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:59:58,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284843724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:59:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [743409010] [2022-12-14 13:59:58,690 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:59:58,690 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:59:58,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:59:58,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:59:58,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:59:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:58,723 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 13:59:58,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 13:59:58,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:58,732 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 13:59:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:58,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 13:59:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:58,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:58,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:58,915 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 13:59:58,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 13:59:59,110 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 13:59:59,111 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 589 treesize of output 555 [2022-12-14 13:59:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:59,124 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 520 treesize of output 496 [2022-12-14 13:59:59,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:59:59,274 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 21 treesize of output 17 [2022-12-14 13:59:59,313 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 21 treesize of output 17 [2022-12-14 13:59:59,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 13:59:59,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:00:00,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32357#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 14:00:00,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:00:00,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:00:00,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 42] total 123 [2022-12-14 14:00:00,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258173961] [2022-12-14 14:00:00,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:00:00,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 14:00:00,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:00,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 14:00:00,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=16578, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 14:00:00,954 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 123 states, 123 states have (on average 2.7154471544715446) internal successors, (334), 123 states have internal predecessors, (334), 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 14:00:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:18,726 INFO L93 Difference]: Finished difference Result 257 states and 270 transitions. [2022-12-14 14:00:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-12-14 14:00:18,726 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.7154471544715446) internal successors, (334), 123 states have internal predecessors, (334), 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 124 [2022-12-14 14:00:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:18,728 INFO L225 Difference]: With dead ends: 257 [2022-12-14 14:00:18,728 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 14:00:18,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16053 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=1997, Invalid=64825, Unknown=0, NotChecked=0, Total=66822 [2022-12-14 14:00:18,731 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 466 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 9338 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 9467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 9338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:18,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1678 Invalid, 9467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 9338 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 14:00:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 14:00:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 128. [2022-12-14 14:00:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 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 14:00:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-12-14 14:00:18,942 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2022-12-14 14:00:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:18,942 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-12-14 14:00:18,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.7154471544715446) internal successors, (334), 123 states have internal predecessors, (334), 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 14:00:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-12-14 14:00:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 14:00:18,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:18,943 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 14:00:18,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 14:00:19,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 14:00:19,144 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash 198084775, now seen corresponding path program 37 times [2022-12-14 14:00:19,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:19,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791951492] [2022-12-14 14:00:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 806 proven. 742 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:00:21,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:21,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791951492] [2022-12-14 14:00:21,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791951492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:21,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013687852] [2022-12-14 14:00:21,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:00:21,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:21,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:21,040 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:21,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 14:00:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 14:00:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 876 proven. 672 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:00:23,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:00:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 876 proven. 672 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:00:24,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013687852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:00:24,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [532628850] [2022-12-14 14:00:24,645 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:00:24,645 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:00:24,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:00:24,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:00:24,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:00:24,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:24,677 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 14:00:24,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 14:00:24,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:24,707 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 14:00:24,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 14:00:24,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:24,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 14:00:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:24,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:24,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:24,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:24,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:00:24,869 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 14:00:24,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 14:00:25,217 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 14:00:25,217 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 1022 treesize of output 976 [2022-12-14 14:00:25,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:25,230 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 953 treesize of output 929 [2022-12-14 14:00:25,506 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 21 treesize of output 17 [2022-12-14 14:00:25,511 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 19 treesize of output 15 [2022-12-14 14:00:25,537 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 19 treesize of output 15 [2022-12-14 14:00:25,542 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 21 treesize of output 17 [2022-12-14 14:00:25,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:00:26,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34102#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 14:00:26,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:00:26,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:00:26,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 40] total 118 [2022-12-14 14:00:26,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834913548] [2022-12-14 14:00:26,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:00:26,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-12-14 14:00:26,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:26,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-12-14 14:00:26,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3025, Invalid=12725, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 14:00:26,784 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 118 states, 118 states have (on average 2.8728813559322033) internal successors, (339), 118 states have internal predecessors, (339), 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 14:00:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:28,493 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2022-12-14 14:00:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 14:00:28,493 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.8728813559322033) internal successors, (339), 118 states have internal predecessors, (339), 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 127 [2022-12-14 14:00:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:28,494 INFO L225 Difference]: With dead ends: 213 [2022-12-14 14:00:28,494 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 14:00:28,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10158 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4648, Invalid=18914, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 14:00:28,495 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 196 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:28,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 363 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:00:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 14:00:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-12-14 14:00:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 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 14:00:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-12-14 14:00:28,710 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 127 [2022-12-14 14:00:28,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:28,710 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-12-14 14:00:28,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.8728813559322033) internal successors, (339), 118 states have internal predecessors, (339), 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 14:00:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-12-14 14:00:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 14:00:28,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:28,711 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 24, 24, 13, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 14:00:28,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 14:00:28,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-14 14:00:28,912 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1104699990, now seen corresponding path program 38 times [2022-12-14 14:00:28,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:28,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397425081] [2022-12-14 14:00:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:28,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 0 proven. 1672 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:00:31,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:31,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397425081] [2022-12-14 14:00:31,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397425081] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:31,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337090167] [2022-12-14 14:00:31,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:00:31,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:31,175 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:31,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 14:01:01,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-12-14 14:01:01,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:01:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-14 14:01:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:01:01,345 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 39 treesize of output 50 [2022-12-14 14:01:01,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 14:01:01,357 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 8 treesize of output 1 [2022-12-14 14:01:01,363 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 15 treesize of output 5 [2022-12-14 14:01:01,434 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 59 treesize of output 67 [2022-12-14 14:01:01,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 14:01:01,456 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 26 treesize of output 15 [2022-12-14 14:01:01,459 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 15 treesize of output 5 [2022-12-14 14:01:05,236 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 14:01:05,236 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 59 treesize of output 38 [2022-12-14 14:01:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 1 proven. 1671 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:01:05,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:01:07,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 14:01:07,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:01:07,329 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 4 case distinctions, treesize of input 36 treesize of output 50 [2022-12-14 14:01:07,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:01:07,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 14:01:07,361 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 112 treesize of output 98 [2022-12-14 14:01:07,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:01:07,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 14:01:07,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2022-12-14 14:01:07,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:01:07,385 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 91 treesize of output 88 [2022-12-14 14:01:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 0 proven. 1672 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:01:07,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337090167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:01:07,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86870208] [2022-12-14 14:01:07,594 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:01:07,594 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:01:07,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:01:07,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:01:07,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:01:07,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,638 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 14:01:07,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 14:01:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,675 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 14:01:07,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 14:01:07,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 14:01:07,749 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:01:07,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,874 INFO L321 Elim1Store]: treesize reduction 307, result has 6.7 percent of original size [2022-12-14 14:01:07,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 26 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 790 treesize of output 809 [2022-12-14 14:01:07,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:07,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:01:07,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 653 treesize of output 644 [2022-12-14 14:01:08,042 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 14:01:08,042 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 499 treesize of output 471 [2022-12-14 14:01:08,051 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 39 treesize of output 19 [2022-12-14 14:01:08,302 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 21 treesize of output 17 [2022-12-14 14:01:08,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 14:01:08,335 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 21 treesize of output 17 [2022-12-14 14:01:08,341 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 19 treesize of output 15 [2022-12-14 14:01:08,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:01:10,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35580#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 14:01:10,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:01:10,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:01:10,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 104 [2022-12-14 14:01:10,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101750370] [2022-12-14 14:01:10,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:01:10,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-12-14 14:01:10,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:01:10,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-12-14 14:01:10,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=11922, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 14:01:10,082 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 104 states, 104 states have (on average 2.644230769230769) internal successors, (275), 104 states have internal predecessors, (275), 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 14:01:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:01:40,160 INFO L93 Difference]: Finished difference Result 271 states and 285 transitions. [2022-12-14 14:01:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-12-14 14:01:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.644230769230769) internal successors, (275), 104 states have internal predecessors, (275), 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 131 [2022-12-14 14:01:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:01:40,161 INFO L225 Difference]: With dead ends: 271 [2022-12-14 14:01:40,161 INFO L226 Difference]: Without dead ends: 269 [2022-12-14 14:01:40,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 324 SyntacticMatches, 3 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20827 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=2911, Invalid=72439, Unknown=0, NotChecked=0, Total=75350 [2022-12-14 14:01:40,164 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 413 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 8625 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 8859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 8625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:01:40,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1477 Invalid, 8859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 8625 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-12-14 14:01:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-12-14 14:01:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 135. [2022-12-14 14:01:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 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 14:01:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-12-14 14:01:40,395 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 131 [2022-12-14 14:01:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:01:40,396 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-12-14 14:01:40,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.644230769230769) internal successors, (275), 104 states have internal predecessors, (275), 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 14:01:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-12-14 14:01:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 14:01:40,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:01:40,396 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 13, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 14:01:40,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-14 14:01:40,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 14:01:40,597 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:01:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:01:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2083259103, now seen corresponding path program 39 times [2022-12-14 14:01:40,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:01:40,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672427898] [2022-12-14 14:01:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:01:40,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:01:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:01:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:01:42,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:01:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672427898] [2022-12-14 14:01:42,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672427898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:01:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211732670] [2022-12-14 14:01:42,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:01:42,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:01:42,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:01:42,662 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:01:42,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 14:01:42,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:01:42,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:01:42,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-14 14:01:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:01:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:43,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 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 14:01:43,525 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 14:01:43,527 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 14:01:43,534 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 14:01:45,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2022-12-14 14:01:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:01:45,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:01:48,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:01:48,374 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 48 treesize of output 58 [2022-12-14 14:01:48,392 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 56 treesize of output 41 [2022-12-14 14:01:48,401 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-14 14:01:48,401 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 41 treesize of output 33 [2022-12-14 14:01:48,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 4 [2022-12-14 14:01:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1746 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:01:49,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211732670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:01:49,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638547548] [2022-12-14 14:01:49,707 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:01:49,707 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:01:49,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:01:49,707 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:01:49,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:01:49,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:49,735 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 14:01:49,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 14:01:49,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:49,741 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 14:01:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:49,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-12-14 14:01:49,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:49,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:01:49,901 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-12-14 14:01:49,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 514 treesize of output 574 [2022-12-14 14:01:50,098 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-12-14 14:01:50,098 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 1020 treesize of output 976 [2022-12-14 14:01:50,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:01:50,116 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 953 treesize of output 936 [2022-12-14 14:01:50,438 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 21 treesize of output 17 [2022-12-14 14:01:50,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 14:01:50,474 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 21 treesize of output 17 [2022-12-14 14:01:50,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 14:01:50,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:01:52,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37486#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 14:01:52,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:01:52,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:01:52,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 131 [2022-12-14 14:01:52,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669825101] [2022-12-14 14:01:52,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:01:52,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-12-14 14:01:52,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:01:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-12-14 14:01:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=18676, Unknown=0, NotChecked=0, Total=19182 [2022-12-14 14:01:52,133 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 131 states, 131 states have (on average 2.7480916030534353) internal successors, (360), 131 states have internal predecessors, (360), 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 14:02:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:02:09,965 INFO L93 Difference]: Finished difference Result 277 states and 291 transitions. [2022-12-14 14:02:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-12-14 14:02:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.7480916030534353) internal successors, (360), 131 states have internal predecessors, (360), 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 134 [2022-12-14 14:02:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:02:09,966 INFO L225 Difference]: With dead ends: 277 [2022-12-14 14:02:09,966 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 14:02:09,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19805 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=2162, Invalid=73188, Unknown=0, NotChecked=0, Total=75350 [2022-12-14 14:02:09,969 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 455 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 10138 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 10272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 10138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:02:09,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 1890 Invalid, 10272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 10138 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 14:02:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 14:02:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 138. [2022-12-14 14:02:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 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 14:02:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-12-14 14:02:10,216 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 134 [2022-12-14 14:02:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:02:10,216 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-12-14 14:02:10,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.7480916030534353) internal successors, (360), 131 states have internal predecessors, (360), 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 14:02:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-12-14 14:02:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:02:10,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:02:10,217 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 13, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 14:02:10,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 14:02:10,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:02:10,418 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:02:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:02:10,420 INFO L85 PathProgramCache]: Analyzing trace with hash 99789238, now seen corresponding path program 40 times [2022-12-14 14:02:10,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:02:10,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960618938] [2022-12-14 14:02:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:02:10,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:02:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:02:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 951 proven. 869 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 14:02:12,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:02:12,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960618938] [2022-12-14 14:02:12,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960618938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:02:12,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565620805] [2022-12-14 14:02:12,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:02:12,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:02:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:02:12,064 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:02:12,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 14:02:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:02:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 14:02:12,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:02:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 1027 proven. 793 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 14:02:14,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:02:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 1027 proven. 793 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 14:02:16,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565620805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:02:16,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090693423] [2022-12-14 14:02:16,126 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 14:02:16,127 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:02:16,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:02:16,127 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:02:16,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:02:16,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:02:16,157 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 14:02:16,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 14:02:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:02:16,165 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 14:02:16,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:02:16,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:02:16,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-12-14 14:02:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:02:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:02:16,237 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 114 treesize of output 94 [2022-12-14 14:02:16,243 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 3 [2022-12-14 14:02:16,295 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 21 treesize of output 17 [2022-12-14 14:02:16,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 14:02:16,332 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 21 treesize of output 17 [2022-12-14 14:02:16,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 14:02:16,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:02:17,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39364#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 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) (= 1 |ULTIMATE.start_main_~DEFAULTVALUE~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 14:02:17,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:02:17,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:02:17,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 43] total 127 [2022-12-14 14:02:17,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712924951] [2022-12-14 14:02:17,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:02:17,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-12-14 14:02:17,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:02:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-12-14 14:02:17,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3493, Invalid=14597, Unknown=0, NotChecked=0, Total=18090 [2022-12-14 14:02:17,642 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 127 states, 127 states have (on average 2.8818897637795278) internal successors, (366), 127 states have internal predecessors, (366), 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 14:02:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:02:19,554 INFO L93 Difference]: Finished difference Result 229 states and 231 transitions. [2022-12-14 14:02:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 14:02:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.8818897637795278) internal successors, (366), 127 states have internal predecessors, (366), 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 137 [2022-12-14 14:02:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:02:19,556 INFO L225 Difference]: With dead ends: 229 [2022-12-14 14:02:19,556 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 14:02:19,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11727 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5352, Invalid=21708, Unknown=0, NotChecked=0, Total=27060 [2022-12-14 14:02:19,557 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 321 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:02:19,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 244 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:02:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 14:02:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2022-12-14 14:02:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 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 14:02:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-12-14 14:02:19,819 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2022-12-14 14:02:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:02:19,820 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-12-14 14:02:19,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.8818897637795278) internal successors, (366), 127 states have internal predecessors, (366), 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 14:02:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-12-14 14:02:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 14:02:19,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:02:19,820 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 26, 26, 14, 14, 1, 1, 1, 1, 1, 1] [2022-12-14 14:02:19,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 14:02:20,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:02:20,021 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:02:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:02:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1466469211, now seen corresponding path program 41 times [2022-12-14 14:02:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:02:20,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602372283] [2022-12-14 14:02:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:02:20,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:02:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:02:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1993 backedges. 0 proven. 1954 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 14:02:22,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:02:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602372283] [2022-12-14 14:02:22,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602372283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:02:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776796913] [2022-12-14 14:02:22,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:02:22,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:02:22,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:02:22,457 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:02:22,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4d30895-7020-433a-83fe-3d67ff1d47df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process