./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.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_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/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_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/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_e19b5557-3f21-4907-a724-7f186aba4bbd/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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- 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 07:05:15,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:05:15,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:05:15,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:05:15,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:05:15,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:05:15,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:05:15,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:05:15,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:05:15,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:05:15,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:05:15,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:05:15,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:05:15,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:05:15,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:05:15,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:05:15,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:05:15,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:05:15,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:05:15,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:05:15,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:05:15,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:05:15,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:05:15,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:05:15,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:05:15,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:05:15,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:05:15,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:05:15,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:05:15,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:05:15,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:05:15,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:05:15,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:05:15,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:05:15,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:05:15,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:05:15,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:05:15,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:05:15,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:05:15,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:05:15,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:05:15,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:05:15,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:05:15,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:05:15,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:05:15,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:05:15,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:05:15,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:05:15,726 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:05:15,726 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:05:15,726 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:05:15,726 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:05:15,726 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:05:15,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:05:15,727 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:05:15,727 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:05:15,727 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:05:15,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:05:15,727 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:05:15,727 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:05:15,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:05:15,728 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:05:15,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:05:15,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:05:15,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:05:15,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:05:15,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:05:15,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:05:15,729 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:05:15,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:05:15,729 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:05:15,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:05:15,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:05:15,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:05:15,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:05:15,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:05:15,730 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:05:15,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:05:15,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:05:15,730 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:05:15,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:05:15,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:05:15,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:05:15,730 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_e19b5557-3f21-4907-a724-7f186aba4bbd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-12-14 07:05:15,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:05:15,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:05:15,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:05:15,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:05:15,917 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:05:15,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-12-14 07:05:18,528 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:05:18,686 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:05:18,686 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-12-14 07:05:18,690 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/data/89e0de985/400691bff71f45908cbf6ce39f66cad8/FLAG2157e3475 [2022-12-14 07:05:18,701 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/data/89e0de985/400691bff71f45908cbf6ce39f66cad8 [2022-12-14 07:05:18,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:05:18,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:05:18,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:05:18,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:05:18,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:05:18,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@979537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18, skipping insertion in model container [2022-12-14 07:05:18,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:05:18,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:05:18,843 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_e19b5557-3f21-4907-a724-7f186aba4bbd/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-12-14 07:05:18,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:05:18,862 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:05:18,871 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_e19b5557-3f21-4907-a724-7f186aba4bbd/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-12-14 07:05:18,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:05:18,887 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:05:18,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18 WrapperNode [2022-12-14 07:05:18,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:05:18,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:05:18,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:05:18,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:05:18,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,913 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-12-14 07:05:18,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:05:18,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:05:18,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:05:18,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:05:18,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,929 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:05:18,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:05:18,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:05:18,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:05:18,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (1/1) ... [2022-12-14 07:05:18,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:05:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:18,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:05:18,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:05:18,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:05:18,993 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 07:05:18,993 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 07:05:18,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:05:18,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:05:18,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:05:18,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:05:18,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:05:18,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:05:18,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:05:19,050 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:05:19,052 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:05:19,164 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:05:19,210 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:05:19,210 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:05:19,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:05:19 BoogieIcfgContainer [2022-12-14 07:05:19,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:05:19,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:05:19,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:05:19,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:05:19,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:05:18" (1/3) ... [2022-12-14 07:05:19,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a958ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:05:19, skipping insertion in model container [2022-12-14 07:05:19,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:05:18" (2/3) ... [2022-12-14 07:05:19,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a958ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:05:19, skipping insertion in model container [2022-12-14 07:05:19,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:05:19" (3/3) ... [2022-12-14 07:05:19,220 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-12-14 07:05:19,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:05:19,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:05:19,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:05:19,278 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;@30d256da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:05:19,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:05:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:05:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 07:05:19,288 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:19,288 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:19,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1232094444, now seen corresponding path program 1 times [2022-12-14 07:05:19,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:19,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155487669] [2022-12-14 07:05:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:19,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:05:19,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155487669] [2022-12-14 07:05:19,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155487669] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:19,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:05:19,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:05:19,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890168294] [2022-12-14 07:05:19,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:19,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:05:19,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:05:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:05:19,635 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:05:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:19,707 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-12-14 07:05:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:05:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-12-14 07:05:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:19,714 INFO L225 Difference]: With dead ends: 25 [2022-12-14 07:05:19,715 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 07:05:19,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:05:19,719 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:19,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:05:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 07:05:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 07:05:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:05:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-12-14 07:05:19,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2022-12-14 07:05:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:19,747 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-12-14 07:05:19,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:05:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-12-14 07:05:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:05:19,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:19,748 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:19,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:05:19,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:19,749 INFO L85 PathProgramCache]: Analyzing trace with hash -460243020, now seen corresponding path program 1 times [2022-12-14 07:05:19,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:19,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087550508] [2022-12-14 07:05:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:19,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:05:19,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087550508] [2022-12-14 07:05:19,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087550508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:05:19,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:05:19,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:05:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336126376] [2022-12-14 07:05:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:05:19,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:05:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:05:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:05:19,831 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 07:05:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:19,881 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2022-12-14 07:05:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:05:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-12-14 07:05:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:19,883 INFO L225 Difference]: With dead ends: 28 [2022-12-14 07:05:19,883 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 07:05:19,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:05:19,884 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:19,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:05:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 07:05:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-12-14 07:05:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:05:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-12-14 07:05:19,889 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2022-12-14 07:05:19,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:19,889 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-12-14 07:05:19,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 07:05:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-12-14 07:05:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:05:19,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:19,890 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:19,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:05:19,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:19,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1912162295, now seen corresponding path program 1 times [2022-12-14 07:05:19,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:19,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778662242] [2022-12-14 07:05:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:19,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:05:20,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:20,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778662242] [2022-12-14 07:05:20,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778662242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:20,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874043100] [2022-12-14 07:05:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:20,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:20,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:20,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:20,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:05:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:05:20,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:20,539 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 11 treesize of output 7 [2022-12-14 07:05:20,585 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 7 [2022-12-14 07:05:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:05:20,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:22,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:05:22,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 07:05:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:05:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874043100] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912530548] [2022-12-14 07:05:22,790 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:05:22,791 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:05:22,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:05:22,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:05:22,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:05:22,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:22,985 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-12-14 07:05:22,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-12-14 07:05:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:23,080 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:05:23,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:05:24,488 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-12-14 07:05:24,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 312 [2022-12-14 07:05:24,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:05:24,915 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:05:24,915 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 31 [2022-12-14 07:05:24,999 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:05:25,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:05:25,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '304#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:05:25,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:05:25,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:05:25,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-12-14 07:05:25,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765827034] [2022-12-14 07:05:25,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:25,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:05:25,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:05:25,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=965, Unknown=1, NotChecked=0, Total=1122 [2022-12-14 07:05:25,853 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:05:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:25,982 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-12-14 07:05:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:05:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 21 [2022-12-14 07:05:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:25,983 INFO L225 Difference]: With dead ends: 26 [2022-12-14 07:05:25,984 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 07:05:25,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=171, Invalid=1088, Unknown=1, NotChecked=0, Total=1260 [2022-12-14 07:05:25,985 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:25,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:05:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 07:05:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-12-14 07:05:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 07:05:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-12-14 07:05:25,988 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 21 [2022-12-14 07:05:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:25,988 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-12-14 07:05:25,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:05:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-12-14 07:05:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 07:05:25,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:25,989 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:25,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:05:26,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:26,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash -852976119, now seen corresponding path program 2 times [2022-12-14 07:05:26,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:26,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113749881] [2022-12-14 07:05:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:26,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:05:26,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113749881] [2022-12-14 07:05:26,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113749881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063663221] [2022-12-14 07:05:26,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:05:26,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:26,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:26,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:26,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:05:26,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:05:26,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:26,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:05:26,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:05:26,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:05:26,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063663221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1131566759] [2022-12-14 07:05:26,409 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:05:26,409 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:05:26,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:05:26,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:05:26,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:05:26,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:26,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:26,539 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-12-14 07:05:26,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-12-14 07:05:26,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:26,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:26,610 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:05:26,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:05:27,627 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-12-14 07:05:27,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 312 [2022-12-14 07:05:27,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:05:27,904 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:05:27,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 07:05:28,001 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:05:28,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:05:28,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '530#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:05:28,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:05:28,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:05:28,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-14 07:05:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197261549] [2022-12-14 07:05:28,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:05:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:05:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-12-14 07:05:28,662 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:05:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:28,718 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-12-14 07:05:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:05:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2022-12-14 07:05:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:28,719 INFO L225 Difference]: With dead ends: 38 [2022-12-14 07:05:28,720 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 07:05:28,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:05:28,720 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:28,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:05:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 07:05:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-12-14 07:05:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:05:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-12-14 07:05:28,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 22 [2022-12-14 07:05:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:28,724 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-12-14 07:05:28,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 07:05:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-12-14 07:05:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 07:05:28,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:28,725 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:28,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 07:05:28,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:28,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1239419988, now seen corresponding path program 3 times [2022-12-14 07:05:28,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:28,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994321681] [2022-12-14 07:05:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:28,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:05:29,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:29,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994321681] [2022-12-14 07:05:29,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994321681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88065698] [2022-12-14 07:05:29,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:05:29,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:29,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:29,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:29,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:05:29,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:05:29,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:29,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:05:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 07:05:29,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 07:05:29,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88065698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:29,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772776308] [2022-12-14 07:05:29,146 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:05:29,146 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:05:29,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:05:29,146 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:05:29,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:05:29,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:29,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:29,263 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-12-14 07:05:29,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-12-14 07:05:29,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:29,322 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:05:29,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:05:30,200 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-12-14 07:05:30,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 312 [2022-12-14 07:05:30,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:05:30,422 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:05:30,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 07:05:30,504 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:05:30,505 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:05:31,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '809#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:05:31,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:05:31,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:05:31,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-14 07:05:31,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504178575] [2022-12-14 07:05:31,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:31,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:05:31,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:31,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:05:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-12-14 07:05:31,199 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 07:05:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:31,263 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-12-14 07:05:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:05:31,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-12-14 07:05:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:31,264 INFO L225 Difference]: With dead ends: 26 [2022-12-14 07:05:31,264 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 07:05:31,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-12-14 07:05:31,266 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:31,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:05:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 07:05:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 07:05:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:05:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-12-14 07:05:31,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 27 [2022-12-14 07:05:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:31,270 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-12-14 07:05:31,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 07:05:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-12-14 07:05:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 07:05:31,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:31,271 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:31,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 07:05:31,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:31,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash -233151156, now seen corresponding path program 4 times [2022-12-14 07:05:31,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:31,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351025366] [2022-12-14 07:05:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:31,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:05:32,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351025366] [2022-12-14 07:05:32,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351025366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85634126] [2022-12-14 07:05:32,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:05:32,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:32,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:32,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:32,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:05:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:32,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 07:05:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:32,424 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 10 treesize of output 8 [2022-12-14 07:05:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:32,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-14 07:05:32,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:32,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-12-14 07:05:32,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-12-14 07:05:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:05:32,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:33,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85634126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212364781] [2022-12-14 07:05:33,167 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:05:33,167 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:05:33,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:05:33,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:05:33,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:05:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:33,264 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:05:33,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:05:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:33,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:33,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 07:05:34,061 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-12-14 07:05:34,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:05:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:05:34,107 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:05:34,108 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 31 [2022-12-14 07:05:34,185 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:05:34,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:05:35,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1054#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:05:35,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:05:35,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:05:35,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-12-14 07:05:35,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056302273] [2022-12-14 07:05:35,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:35,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 07:05:35,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 07:05:35,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 07:05:35,117 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:05:37,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:05:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:37,864 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-12-14 07:05:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:05:37,864 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2022-12-14 07:05:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:37,865 INFO L225 Difference]: With dead ends: 41 [2022-12-14 07:05:37,865 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 07:05:37,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=376, Invalid=2930, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 07:05:37,867 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:37,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 07:05:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 07:05:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-12-14 07:05:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:05:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-12-14 07:05:37,875 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 28 [2022-12-14 07:05:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:37,875 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-12-14 07:05:37,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:05:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-12-14 07:05:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 07:05:37,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:37,876 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:37,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:05:38,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 07:05:38,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1361783636, now seen corresponding path program 5 times [2022-12-14 07:05:38,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:38,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728508278] [2022-12-14 07:05:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:38,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:05:38,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:38,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728508278] [2022-12-14 07:05:38,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728508278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:38,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671569330] [2022-12-14 07:05:38,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:05:38,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:38,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:38,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:38,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:05:38,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:05:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:38,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:05:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 07:05:38,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 07:05:38,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671569330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243301405] [2022-12-14 07:05:38,313 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:05:38,313 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:05:38,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:05:38,313 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:05:38,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:05:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:38,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:38,407 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:05:38,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:05:38,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:38,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:38,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:38,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 07:05:39,298 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-12-14 07:05:39,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 265 treesize of output 311 [2022-12-14 07:05:39,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:05:39,488 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:05:39,488 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 31 [2022-12-14 07:05:39,553 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:05:39,554 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:05:40,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1385#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:05:40,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:05:40,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:05:40,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-12-14 07:05:40,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742898913] [2022-12-14 07:05:40,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:40,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 07:05:40,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 07:05:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-12-14 07:05:40,285 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 07:05:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:40,395 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-12-14 07:05:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 07:05:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2022-12-14 07:05:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:40,396 INFO L225 Difference]: With dead ends: 52 [2022-12-14 07:05:40,396 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 07:05:40,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-12-14 07:05:40,397 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:40,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 68 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:05:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 07:05:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-12-14 07:05:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 07:05:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-12-14 07:05:40,405 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 29 [2022-12-14 07:05:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:40,405 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-12-14 07:05:40,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 07:05:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-12-14 07:05:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:05:40,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:40,406 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:40,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 07:05:40,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 07:05:40,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:40,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:40,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1842499049, now seen corresponding path program 6 times [2022-12-14 07:05:40,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:40,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876461928] [2022-12-14 07:05:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:40,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:05:42,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:42,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876461928] [2022-12-14 07:05:42,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876461928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:42,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507058777] [2022-12-14 07:05:42,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:05:42,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:42,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:42,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:42,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:05:42,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:05:42,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 07:05:42,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:42,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:05:42,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:42,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:42,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 50 [2022-12-14 07:05:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:43,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:05:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:43,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 70 [2022-12-14 07:05:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:43,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:43,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-12-14 07:05:43,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2022-12-14 07:05:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:05:43,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:44,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507058777] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:44,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721009158] [2022-12-14 07:05:44,172 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:05:44,172 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:05:44,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:05:44,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:05:44,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:05:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:44,287 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:05:44,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:05:44,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:44,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:44,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 07:05:45,235 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-12-14 07:05:45,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 56 [2022-12-14 07:05:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:05:45,278 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:05:45,279 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 31 [2022-12-14 07:05:45,353 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:05:45,354 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:05:46,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1721#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:05:46,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:05:46,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:05:46,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2022-12-14 07:05:46,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867756716] [2022-12-14 07:05:46,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 07:05:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 07:05:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 07:05:46,500 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-12-14 07:05:49,230 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 07:05:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:50,085 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-12-14 07:05:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 07:05:50,085 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 35 [2022-12-14 07:05:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:50,086 INFO L225 Difference]: With dead ends: 55 [2022-12-14 07:05:50,086 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 07:05:50,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=576, Invalid=4536, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 07:05:50,087 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:50,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 91 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 559 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 07:05:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 07:05:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-12-14 07:05:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:05:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-12-14 07:05:50,097 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 35 [2022-12-14 07:05:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:50,097 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-12-14 07:05:50,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-12-14 07:05:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-12-14 07:05:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:05:50,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:50,098 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:50,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:05:50,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:50,300 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1784051455, now seen corresponding path program 7 times [2022-12-14 07:05:50,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:50,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950447132] [2022-12-14 07:05:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:50,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 07:05:50,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:50,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950447132] [2022-12-14 07:05:50,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950447132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:50,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971880683] [2022-12-14 07:05:50,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:05:50,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:50,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:50,405 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:50,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:05:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:50,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:05:50,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 07:05:50,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 07:05:50,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971880683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:50,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175087488] [2022-12-14 07:05:50,625 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:05:50,625 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:05:50,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:05:50,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:05:50,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:05:50,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:50,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:50,752 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-12-14 07:05:50,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-12-14 07:05:50,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:50,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:05:50,822 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:05:50,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:05:51,759 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-12-14 07:05:51,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 312 [2022-12-14 07:05:51,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:05:51,962 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:05:51,963 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 31 [2022-12-14 07:05:52,033 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:05:52,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:05:52,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2157#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:05:52,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:05:52,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:05:52,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-12-14 07:05:52,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399259841] [2022-12-14 07:05:52,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:52,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:05:52,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:05:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:05:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:05:52,748 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:05:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:53,019 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-12-14 07:05:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 07:05:53,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2022-12-14 07:05:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:53,020 INFO L225 Difference]: With dead ends: 59 [2022-12-14 07:05:53,020 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 07:05:53,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 07:05:53,022 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:53,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 106 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:05:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 07:05:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-12-14 07:05:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:05:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-12-14 07:05:53,030 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 35 [2022-12-14 07:05:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:53,030 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-12-14 07:05:53,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:05:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-12-14 07:05:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 07:05:53,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:53,032 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:53,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 07:05:53,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:53,233 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:53,235 INFO L85 PathProgramCache]: Analyzing trace with hash 21253570, now seen corresponding path program 8 times [2022-12-14 07:05:53,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:05:53,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800798501] [2022-12-14 07:05:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:05:53,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:05:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:05:53,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:05:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800798501] [2022-12-14 07:05:53,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800798501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:05:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960869649] [2022-12-14 07:05:53,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:05:53,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:53,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:53,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:05:53,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 07:05:53,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:53,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 07:05:53,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:53,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:05:53,756 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-14 07:05:53,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 77 [2022-12-14 07:05:53,821 INFO L321 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2022-12-14 07:05:53,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 90 [2022-12-14 07:05:53,930 INFO L321 Elim1Store]: treesize reduction 150, result has 16.2 percent of original size [2022-12-14 07:05:53,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 223 treesize of output 147 [2022-12-14 07:06:21,310 WARN L233 SmtUtils]: Spent 18.07s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:06:24,230 INFO L321 Elim1Store]: treesize reduction 107, result has 29.1 percent of original size [2022-12-14 07:06:24,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 255 treesize of output 96 [2022-12-14 07:06:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 07:06:24,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:35,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960869649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:06:35,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535125055] [2022-12-14 07:06:35,264 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:06:35,265 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:06:35,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:06:35,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:06:35,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:06:35,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:06:35,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:06:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:06:35,387 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-12-14 07:06:35,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-12-14 07:06:35,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:06:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:06:35,445 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:06:35,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:06:36,222 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-12-14 07:06:36,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 56 [2022-12-14 07:06:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:06:36,260 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:06:36,261 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 31 [2022-12-14 07:06:36,326 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:06:36,327 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:06:37,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2555#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:06:37,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:06:37,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:06:37,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2022-12-14 07:06:37,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652130138] [2022-12-14 07:06:37,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:06:37,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 07:06:37,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:06:37,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 07:06:37,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2279, Unknown=7, NotChecked=0, Total=2550 [2022-12-14 07:06:37,847 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 07:06:42,107 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 07:06:46,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:06:50,287 WARN L539 Checker$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 07:06:54,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:07:00,648 WARN L539 Checker$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 07:07:02,776 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 07:07:31,418 WARN L233 SmtUtils]: Spent 24.19s on a formula simplification. DAG size of input: 106 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:07:40,498 WARN L233 SmtUtils]: Spent 8.97s on a formula simplification. DAG size of input: 102 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:07:50,732 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 100 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:07:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:51,255 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-12-14 07:07:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 07:07:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2022-12-14 07:07:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:51,256 INFO L225 Difference]: With dead ends: 40 [2022-12-14 07:07:51,257 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 07:07:51,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 101.7s TimeCoverageRelationStatistics Valid=593, Invalid=4226, Unknown=11, NotChecked=0, Total=4830 [2022-12-14 07:07:51,258 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 51 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:51,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 394 Invalid, 6 Unknown, 0 Unchecked, 13.6s Time] [2022-12-14 07:07:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 07:07:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-14 07:07:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:07:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-12-14 07:07:51,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 40 [2022-12-14 07:07:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:51,270 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-12-14 07:07:51,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 07:07:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-12-14 07:07:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 07:07:51,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:51,271 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:07:51,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:07:51,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 07:07:51,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:07:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:51,473 INFO L85 PathProgramCache]: Analyzing trace with hash -731476564, now seen corresponding path program 9 times [2022-12-14 07:07:51,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:07:51,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132342381] [2022-12-14 07:07:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:51,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:07:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 07:07:54,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:07:54,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132342381] [2022-12-14 07:07:54,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132342381] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:07:54,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674015751] [2022-12-14 07:07:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:07:54,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:07:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:07:54,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:07:54,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:07:54,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:07:54,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:07:54,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-14 07:07:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:54,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:07:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 62 [2022-12-14 07:07:54,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:07:54,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 82 [2022-12-14 07:07:54,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:07:54,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:54,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 102 [2022-12-14 07:07:55,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:55,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:55,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 132 [2022-12-14 07:07:55,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 81 [2022-12-14 07:07:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 07:07:56,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:57,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674015751] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:07:57,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [970840805] [2022-12-14 07:07:57,851 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:07:57,851 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:07:57,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:07:57,852 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:07:57,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:07:57,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:57,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:57,961 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:07:57,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:07:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:57,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 07:07:58,842 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-12-14 07:07:58,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 265 treesize of output 311 [2022-12-14 07:07:59,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:07:59,046 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:07:59,046 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 1 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 07:07:59,125 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:07:59,125 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:08:00,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2945#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:08:00,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:08:00,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:08:00,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 39 [2022-12-14 07:08:00,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037230090] [2022-12-14 07:08:00,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:08:00,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 07:08:00,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:08:00,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 07:08:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3582, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 07:08:00,767 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 07:08:04,788 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 07:08:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:06,489 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-12-14 07:08:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 07:08:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 42 [2022-12-14 07:08:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:06,490 INFO L225 Difference]: With dead ends: 58 [2022-12-14 07:08:06,490 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 07:08:06,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=742, Invalid=7448, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 07:08:06,492 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:06,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 62 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 892 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 07:08:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 07:08:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2022-12-14 07:08:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:08:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-12-14 07:08:06,510 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 42 [2022-12-14 07:08:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:06,511 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-12-14 07:08:06,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 07:08:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-12-14 07:08:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 07:08:06,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:06,511 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:06,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:08:06,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 07:08:06,713 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:08:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1201402124, now seen corresponding path program 10 times [2022-12-14 07:08:06,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:08:06,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987446841] [2022-12-14 07:08:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:06,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:08:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:08:06,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:08:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987446841] [2022-12-14 07:08:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987446841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:08:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628005374] [2022-12-14 07:08:06,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:08:06,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:08:06,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:08:06,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:08:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:06,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:08:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:08:07,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:08:07,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628005374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393510446] [2022-12-14 07:08:07,097 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:08:07,097 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:08:07,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:08:07,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:08:07,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:08:07,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:07,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:07,213 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:08:07,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:08:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:07,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 07:08:08,102 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-12-14 07:08:08,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:08:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:08:08,148 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:08:08,148 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 31 [2022-12-14 07:08:08,218 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:08:08,219 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:08:09,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3459#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:08:09,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:08:09,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:08:09,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-14 07:08:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468160131] [2022-12-14 07:08:09,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:08:09,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 07:08:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:08:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 07:08:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 07:08:09,048 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-14 07:08:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:09,226 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-12-14 07:08:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:08:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 43 [2022-12-14 07:08:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:09,227 INFO L225 Difference]: With dead ends: 64 [2022-12-14 07:08:09,227 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 07:08:09,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 07:08:09,228 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:09,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 61 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:08:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 07:08:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-12-14 07:08:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:08:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-12-14 07:08:09,242 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 43 [2022-12-14 07:08:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:09,242 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-12-14 07:08:09,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-14 07:08:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-12-14 07:08:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 07:08:09,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:09,243 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:09,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 07:08:09,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:09,444 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:08:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1044878345, now seen corresponding path program 11 times [2022-12-14 07:08:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:08:09,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307581030] [2022-12-14 07:08:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:09,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:08:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 07:08:09,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:08:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307581030] [2022-12-14 07:08:09,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307581030] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:08:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354347022] [2022-12-14 07:08:09,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:08:09,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:08:09,602 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:08:09,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:08:09,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 07:08:09,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:09,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:08:09,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:08:09,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:08:09,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354347022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:09,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684133968] [2022-12-14 07:08:09,785 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:08:09,785 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:08:09,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:08:09,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:08:09,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:08:09,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:09,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:09,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:09,888 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-12-14 07:08:09,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-12-14 07:08:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:09,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:09,957 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:08:09,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:08:10,759 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-12-14 07:08:10,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:08:10,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:08:10,801 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:08:10,802 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 31 [2022-12-14 07:08:10,863 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:08:10,864 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:08:11,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3955#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:08:11,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:08:11,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:08:11,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-14 07:08:11,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438816224] [2022-12-14 07:08:11,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:08:11,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 07:08:11,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:08:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 07:08:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 07:08:11,646 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 07:08:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:11,838 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-12-14 07:08:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 07:08:11,838 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-12-14 07:08:11,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:11,839 INFO L225 Difference]: With dead ends: 41 [2022-12-14 07:08:11,839 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 07:08:11,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 07:08:11,839 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:11,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 78 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:08:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 07:08:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 07:08:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:08:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-12-14 07:08:11,853 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2022-12-14 07:08:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:11,854 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-12-14 07:08:11,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 07:08:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-12-14 07:08:11,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 07:08:11,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:11,854 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:11,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 07:08:12,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:12,056 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:08:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:12,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1968974793, now seen corresponding path program 12 times [2022-12-14 07:08:12,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:08:12,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195159744] [2022-12-14 07:08:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:12,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:08:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:08:16,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:08:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195159744] [2022-12-14 07:08:16,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195159744] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:08:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278365211] [2022-12-14 07:08:16,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:08:16,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:08:16,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:08:16,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:08:16,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:08:16,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 07:08:16,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:16,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:08:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:08:17,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 85 [2022-12-14 07:08:17,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:08:17,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 105 [2022-12-14 07:08:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 103 [2022-12-14 07:08:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:08:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:17,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2022-12-14 07:08:18,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:18,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:18,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 191 [2022-12-14 07:08:19,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 11 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 405 treesize of output 125 [2022-12-14 07:08:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:08:34,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:47,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278365211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:08:47,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977045661] [2022-12-14 07:08:47,418 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:08:47,418 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:08:47,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:08:47,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:08:47,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:08:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:47,535 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:08:47,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:08:47,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:47,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:47,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 07:08:48,466 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-12-14 07:08:48,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:08:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:08:48,515 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:08:48,515 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 31 [2022-12-14 07:08:48,606 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:08:48,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:08:50,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4373#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:08:50,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:08:50,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:08:50,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 45 [2022-12-14 07:08:50,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656836972] [2022-12-14 07:08:50,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:08:50,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 07:08:50,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:08:50,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 07:08:50,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4653, Unknown=3, NotChecked=0, Total=4970 [2022-12-14 07:08:50,764 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 07:08:55,783 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 07:08:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:58,366 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-12-14 07:08:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 07:08:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 49 [2022-12-14 07:08:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:58,366 INFO L225 Difference]: With dead ends: 58 [2022-12-14 07:08:58,367 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 07:08:58,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=751, Invalid=9146, Unknown=3, NotChecked=0, Total=9900 [2022-12-14 07:08:58,369 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:58,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 119 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1213 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 07:08:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 07:08:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2022-12-14 07:08:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 07:08:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-12-14 07:08:58,393 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 49 [2022-12-14 07:08:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:58,393 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-12-14 07:08:58,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 07:08:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-12-14 07:08:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 07:08:58,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:58,394 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:58,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 07:08:58,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 07:08:58,596 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:08:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash -909141559, now seen corresponding path program 13 times [2022-12-14 07:08:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:08:58,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779422355] [2022-12-14 07:08:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:08:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 07:08:58,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:08:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779422355] [2022-12-14 07:08:58,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779422355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:08:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229308851] [2022-12-14 07:08:58,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:08:58,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:58,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:08:58,770 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:08:58,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:08:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:58,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:08:58,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 07:08:58,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 07:08:59,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229308851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235051732] [2022-12-14 07:08:59,044 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 07:08:59,044 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:08:59,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:08:59,045 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:08:59,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:08:59,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:59,141 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 07:08:59,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 07:08:59,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:59,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:59,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:08:59,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 07:08:59,878 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-12-14 07:08:59,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 07:08:59,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:08:59,915 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 07:08:59,915 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 31 [2022-12-14 07:08:59,974 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 07:08:59,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:09:00,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4930#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:09:00,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:09:00,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:09:00,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-12-14 07:09:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95151457] [2022-12-14 07:09:00,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:09:00,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:09:00,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:09:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:09:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:09:00,859 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:09:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:09:01,071 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-12-14 07:09:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 07:09:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 50 [2022-12-14 07:09:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:09:01,072 INFO L225 Difference]: With dead ends: 79 [2022-12-14 07:09:01,072 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 07:09:01,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 07:09:01,073 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:09:01,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 85 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:09:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 07:09:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-12-14 07:09:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:09:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-12-14 07:09:01,095 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 50 [2022-12-14 07:09:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:09:01,095 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-12-14 07:09:01,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 07:09:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-12-14 07:09:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 07:09:01,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:09:01,096 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:09:01,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 07:09:01,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19b5557-3f21-4907-a724-7f186aba4bbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:09:01,297 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:09:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:09:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1352056332, now seen corresponding path program 14 times [2022-12-14 07:09:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:09:01,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910960370] [2022-12-14 07:09:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:09:01,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:09:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat