./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_05.i --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_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/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_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/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_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/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 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 --- 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 14:52:15,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:52:15,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:52:15,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:52:15,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:52:15,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:52:15,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:52:15,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:52:15,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:52:15,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:52:15,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:52:15,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:52:15,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:52:15,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:52:15,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:52:15,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:52:15,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:52:15,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:52:15,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:52:15,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:52:15,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:52:15,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:52:15,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:52:15,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:52:15,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:52:15,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:52:15,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:52:15,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:52:15,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:52:15,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:52:15,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:52:15,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:52:15,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:52:15,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:52:15,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:52:15,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:52:15,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:52:15,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:52:15,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:52:15,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:52:15,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:52:15,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:52:15,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:52:15,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:52:15,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:52:15,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:52:15,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:52:15,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:52:15,817 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:52:15,817 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:52:15,818 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:52:15,818 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:52:15,818 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:52:15,818 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:52:15,818 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:52:15,819 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:52:15,819 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:52:15,819 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:52:15,819 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:52:15,819 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:52:15,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:52:15,820 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:52:15,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:52:15,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:52:15,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:52:15,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:52:15,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:52:15,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:52:15,822 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:52:15,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:52:15,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:52:15,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:52:15,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:52:15,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:52:15,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:52:15,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:52:15,823 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:52:15,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:52:15,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:52:15,824 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:52:15,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:52:15,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:52:15,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:52:15,824 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_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 [2022-12-14 14:52:16,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:52:16,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:52:16,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:52:16,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:52:16,041 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:52:16,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_two_index_05.i [2022-12-14 14:52:18,562 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:52:18,688 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:52:18,688 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/sv-benchmarks/c/array-examples/standard_two_index_05.i [2022-12-14 14:52:18,693 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/data/e8379a0cf/9b7cf5223b814c81881fc094bc99752c/FLAG08d899067 [2022-12-14 14:52:18,707 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/data/e8379a0cf/9b7cf5223b814c81881fc094bc99752c [2022-12-14 14:52:18,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:52:18,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:52:18,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:52:18,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:52:18,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:52:18,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0b73ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18, skipping insertion in model container [2022-12-14 14:52:18,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:52:18,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:52:18,834 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_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/sv-benchmarks/c/array-examples/standard_two_index_05.i[814,827] [2022-12-14 14:52:18,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:52:18,850 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:52:18,858 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_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/sv-benchmarks/c/array-examples/standard_two_index_05.i[814,827] [2022-12-14 14:52:18,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:52:18,873 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:52:18,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18 WrapperNode [2022-12-14 14:52:18,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:52:18,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:52:18,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:52:18,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:52:18,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,896 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-12-14 14:52:18,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:52:18,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:52:18,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:52:18,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:52:18,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:52:18,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:52:18,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:52:18,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:52:18,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (1/1) ... [2022-12-14 14:52:18,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:52:18,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:18,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:52:18,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:52:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:52:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:52:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 14:52:18,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 14:52:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:52:18,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:52:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 14:52:18,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 14:52:19,044 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:52:19,046 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:52:19,149 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:52:19,173 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:52:19,173 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 14:52:19,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:19 BoogieIcfgContainer [2022-12-14 14:52:19,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:52:19,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:52:19,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:52:19,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:52:19,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:52:18" (1/3) ... [2022-12-14 14:52:19,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8a0c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:19, skipping insertion in model container [2022-12-14 14:52:19,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:18" (2/3) ... [2022-12-14 14:52:19,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8a0c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:19, skipping insertion in model container [2022-12-14 14:52:19,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:19" (3/3) ... [2022-12-14 14:52:19,182 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2022-12-14 14:52:19,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:52:19,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:52:19,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:52:19,234 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;@ea72857, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:52:19,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:52:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 14:52:19,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:19,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 14:52:19,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:19,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1747889330, now seen corresponding path program 1 times [2022-12-14 14:52:19,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:19,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300876597] [2022-12-14 14:52:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:19,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300876597] [2022-12-14 14:52:19,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300876597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:19,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:52:19,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:52:19,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462193486] [2022-12-14 14:52:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:19,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:19,427 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:19,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:19,457 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-12-14 14:52:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:19,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 14:52:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:19,465 INFO L225 Difference]: With dead ends: 17 [2022-12-14 14:52:19,465 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 14:52:19,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:52:19,470 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:19,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 14:52:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 14:52:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-12-14 14:52:19,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-12-14 14:52:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:19,493 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-12-14 14:52:19,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-12-14 14:52:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:52:19,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:19,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:19,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:52:19,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:19,495 INFO L85 PathProgramCache]: Analyzing trace with hash 274671409, now seen corresponding path program 1 times [2022-12-14 14:52:19,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:19,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383482995] [2022-12-14 14:52:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:19,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:19,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:19,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383482995] [2022-12-14 14:52:19,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383482995] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79887499] [2022-12-14 14:52:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:19,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:19,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:19,556 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:19,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:52:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:52:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:52:19,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:52:19,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79887499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:19,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:52:19,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-14 14:52:19,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348160390] [2022-12-14 14:52:19,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:19,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:52:19,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:52:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:52:19,628 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:19,655 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-14 14:52:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:52:19,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 14:52:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:19,656 INFO L225 Difference]: With dead ends: 20 [2022-12-14 14:52:19,656 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 14:52:19,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:52:19,658 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:19,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 14:52:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-12-14 14:52:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 14:52:19,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-12-14 14:52:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:19,662 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 14:52:19,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 14:52:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 14:52:19,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:19,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:19,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:52:19,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 14:52:19,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash -108579109, now seen corresponding path program 1 times [2022-12-14 14:52:19,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:19,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129605421] [2022-12-14 14:52:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:19,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:52:20,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:20,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129605421] [2022-12-14 14:52:20,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129605421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:20,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043585206] [2022-12-14 14:52:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:20,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:20,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:20,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:20,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:52:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:20,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:52:20,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:52:20,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:52:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:52:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043585206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:52:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759784121] [2022-12-14 14:52:20,134 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 14:52:20,134 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:52:20,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:52:20,141 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:52:20,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:52:20,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,245 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 14:52:20,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 14:52:20,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,297 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:52:20,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 14:52:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:52:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:52:20,424 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:52:20,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-12-14 14:52:20,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:52:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 14:52:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:20,596 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 14:52:20,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 14:52:20,672 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 14:52:20,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:52:20,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:52:20,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:52:20,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:52:20,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:52:20,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 14:52:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120902243] [2022-12-14 14:52:20,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:52:20,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:52:20,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:52:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:52:20,798 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:20,825 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-12-14 14:52:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:52:20,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 14:52:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:20,826 INFO L225 Difference]: With dead ends: 31 [2022-12-14 14:52:20,826 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 14:52:20,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:52:20,828 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:20,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 14:52:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-12-14 14:52:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 14:52:20,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-12-14 14:52:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:20,831 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 14:52:20,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 14:52:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 14:52:20,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:20,831 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:20,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 14:52:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:21,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1284839922, now seen corresponding path program 2 times [2022-12-14 14:52:21,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:21,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973894395] [2022-12-14 14:52:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:21,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:52:21,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973894395] [2022-12-14 14:52:21,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973894395] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247087809] [2022-12-14 14:52:21,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:52:21,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:21,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:21,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:52:21,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:52:21,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:52:21,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 14:52:21,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:52:21,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:52:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:52:21,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247087809] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:52:21,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [847993752] [2022-12-14 14:52:21,305 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 14:52:21,305 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:52:21,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:52:21,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:52:21,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:52:21,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:21,342 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 14:52:21,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 14:52:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:21,378 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:52:21,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 14:52:21,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:21,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:52:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:21,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:52:21,467 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:52:21,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-12-14 14:52:21,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:52:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:21,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 14:52:21,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:21,624 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-12-14 14:52:21,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-12-14 14:52:21,698 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 14:52:21,698 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 25 treesize of output 25 [2022-12-14 14:52:21,708 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:52:21,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:52:21,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:52:21,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:52:21,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-14 14:52:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959797634] [2022-12-14 14:52:21,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:52:21,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 14:52:21,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 14:52:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:52:21,811 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:21,857 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-12-14 14:52:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:52:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 14:52:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:21,858 INFO L225 Difference]: With dead ends: 54 [2022-12-14 14:52:21,858 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 14:52:21,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:52:21,859 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:21,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 14:52:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-12-14 14:52:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 14:52:21,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-12-14 14:52:21,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:21,864 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 14:52:21,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 14:52:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 14:52:21,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:21,865 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:21,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 14:52:22,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:22,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:22,067 INFO L85 PathProgramCache]: Analyzing trace with hash 376721006, now seen corresponding path program 3 times [2022-12-14 14:52:22,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:22,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545372988] [2022-12-14 14:52:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:22,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:52:22,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545372988] [2022-12-14 14:52:22,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545372988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982401463] [2022-12-14 14:52:22,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:52:22,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:22,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:22,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:22,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:52:22,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:52:22,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:52:22,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:52:22,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:52:22,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:52:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:52:22,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982401463] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:52:22,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562959240] [2022-12-14 14:52:22,389 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 14:52:22,389 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:52:22,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:52:22,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:52:22,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:52:22,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:22,431 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:52:22,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 14:52:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:22,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 14:52:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:22,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:52:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:22,530 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:52:22,531 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 3 case distinctions, treesize of input 258 treesize of output 246 [2022-12-14 14:52:22,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:52:22,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:22,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:52:22,642 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-12-14 14:52:22,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2022-12-14 14:52:22,675 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 14:52:22,675 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 25 treesize of output 25 [2022-12-14 14:52:22,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:52:22,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '555#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:52:22,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:52:22,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:52:22,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-12-14 14:52:22,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838773348] [2022-12-14 14:52:22,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:52:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 14:52:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 14:52:22,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-12-14 14:52:22,820 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:22,900 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-12-14 14:52:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 14:52:22,901 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 14:52:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:22,901 INFO L225 Difference]: With dead ends: 93 [2022-12-14 14:52:22,901 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 14:52:22,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-12-14 14:52:22,902 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:22,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 48 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:52:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 14:52:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 36. [2022-12-14 14:52:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-12-14 14:52:22,906 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2022-12-14 14:52:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:22,906 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-12-14 14:52:22,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-12-14 14:52:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 14:52:22,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:22,907 INFO L195 NwaCegarLoop]: trace histogram [19, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:22,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:52:23,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:23,108 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1462949573, now seen corresponding path program 4 times [2022-12-14 14:52:23,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958794462] [2022-12-14 14:52:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 14:52:23,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:23,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958794462] [2022-12-14 14:52:23,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958794462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:23,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521812794] [2022-12-14 14:52:23,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:52:23,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:23,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:23,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:23,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:52:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:23,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 14:52:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 14:52:23,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:52:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 14:52:23,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521812794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:52:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627249875] [2022-12-14 14:52:23,784 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 14:52:23,784 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:52:23,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:52:23,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:52:23,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:52:23,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:23,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:23,825 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 14:52:23,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 14:52:23,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:23,857 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:52:23,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 14:52:23,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:23,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:52:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:23,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:23,935 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:52:23,935 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 3 case distinctions, treesize of input 258 treesize of output 246 [2022-12-14 14:52:23,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:52:23,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:23,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 14:52:24,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:24,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:24,038 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 14:52:24,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 14:52:24,112 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 14:52:24,112 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 25 treesize of output 25 [2022-12-14 14:52:24,123 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:52:24,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1015#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:52:24,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:52:24,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:52:24,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 49 [2022-12-14 14:52:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133526347] [2022-12-14 14:52:24,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:52:24,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 14:52:24,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 14:52:24,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 14:52:24,253 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:24,388 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2022-12-14 14:52:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 14:52:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 14:52:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:24,390 INFO L225 Difference]: With dead ends: 153 [2022-12-14 14:52:24,390 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 14:52:24,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 14:52:24,392 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 203 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:24,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 78 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:52:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 14:52:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 68. [2022-12-14 14:52:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-12-14 14:52:24,402 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 34 [2022-12-14 14:52:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:24,402 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-12-14 14:52:24,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-12-14 14:52:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 14:52:24,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:24,404 INFO L195 NwaCegarLoop]: trace histogram [46, 14, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:24,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:52:24,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 14:52:24,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1929764334, now seen corresponding path program 5 times [2022-12-14 14:52:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:24,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859926046] [2022-12-14 14:52:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:24,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 14:52:25,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:25,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859926046] [2022-12-14 14:52:25,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859926046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:25,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29372663] [2022-12-14 14:52:25,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:52:25,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:25,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:25,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:25,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:52:27,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 14:52:27,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:52:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:52:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 14:52:27,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:52:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 14:52:27,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29372663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:52:27,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1494280678] [2022-12-14 14:52:27,914 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 14:52:27,914 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:52:27,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:52:27,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:52:27,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:52:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:27,941 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:52:27,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 14:52:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:27,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 14:52:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:27,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:52:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:27,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:52:28,015 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 14:52:28,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-12-14 14:52:28,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:52:28,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:28,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-12-14 14:52:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:28,132 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-12-14 14:52:28,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-12-14 14:52:28,175 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 14:52:28,175 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 25 treesize of output 25 [2022-12-14 14:52:28,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:52:28,290 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1815#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:52:28,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:52:28,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:52:28,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-12-14 14:52:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509183639] [2022-12-14 14:52:28,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:52:28,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 14:52:28,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 14:52:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=766, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 14:52:28,293 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:28,474 INFO L93 Difference]: Finished difference Result 235 states and 253 transitions. [2022-12-14 14:52:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 14:52:28,474 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-14 14:52:28,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:28,476 INFO L225 Difference]: With dead ends: 235 [2022-12-14 14:52:28,476 INFO L226 Difference]: Without dead ends: 230 [2022-12-14 14:52:28,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=766, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 14:52:28,477 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 372 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:28,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 90 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:52:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-12-14 14:52:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 84. [2022-12-14 14:52:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-12-14 14:52:28,488 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 66 [2022-12-14 14:52:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:28,488 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-12-14 14:52:28,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-12-14 14:52:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 14:52:28,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:28,489 INFO L195 NwaCegarLoop]: trace histogram [46, 30, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:28,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:52:28,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 14:52:28,691 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash -28725778, now seen corresponding path program 6 times [2022-12-14 14:52:28,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:28,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177885259] [2022-12-14 14:52:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 14:52:29,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:29,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177885259] [2022-12-14 14:52:29,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177885259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:29,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624249184] [2022-12-14 14:52:29,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:52:29,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:29,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:29,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:52:29,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:52:29,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:52:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 14:52:29,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-12-14 14:52:29,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:52:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-12-14 14:52:31,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624249184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:52:31,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [950513431] [2022-12-14 14:52:31,260 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 14:52:31,260 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:52:31,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:52:31,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:52:31,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:52:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:31,283 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 14:52:31,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 14:52:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:31,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:31,313 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:52:31,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 14:52:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:31,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:52:31,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:31,373 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:52:31,374 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 3 case distinctions, treesize of input 258 treesize of output 246 [2022-12-14 14:52:31,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:52:31,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:31,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 14:52:31,462 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-12-14 14:52:31,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2022-12-14 14:52:31,492 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 14:52:31,492 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 25 treesize of output 25 [2022-12-14 14:52:31,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:52:31,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2932#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:52:31,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:52:31,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:52:31,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 48, 48] total 118 [2022-12-14 14:52:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743588400] [2022-12-14 14:52:31,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:52:31,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-12-14 14:52:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-12-14 14:52:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7266, Invalid=7740, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 14:52:31,652 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:32,668 INFO L93 Difference]: Finished difference Result 405 states and 488 transitions. [2022-12-14 14:52:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-12-14 14:52:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-12-14 14:52:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:32,669 INFO L225 Difference]: With dead ends: 405 [2022-12-14 14:52:32,669 INFO L226 Difference]: Without dead ends: 369 [2022-12-14 14:52:32,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7851 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7266, Invalid=7740, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 14:52:32,672 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 935 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:32,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 195 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:52:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-12-14 14:52:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 164. [2022-12-14 14:52:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-12-14 14:52:32,680 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 82 [2022-12-14 14:52:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:32,680 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-12-14 14:52:32,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-12-14 14:52:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 14:52:32,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:32,682 INFO L195 NwaCegarLoop]: trace histogram [115, 41, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:32,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:52:32,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:32,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1529276219, now seen corresponding path program 7 times [2022-12-14 14:52:32,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:32,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104966260] [2022-12-14 14:52:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:32,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7531 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2022-12-14 14:52:34,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:34,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104966260] [2022-12-14 14:52:34,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104966260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:34,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879807239] [2022-12-14 14:52:34,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:52:34,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:34,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:34,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:34,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:52:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 117 conjunts are in the unsatisfiable core [2022-12-14 14:52:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7531 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-12-14 14:52:35,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:52:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7531 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-12-14 14:52:40,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879807239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:52:40,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [45569106] [2022-12-14 14:52:40,750 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 14:52:40,750 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:52:40,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:52:40,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:52:40,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:52:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,777 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:52:40,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 14:52:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 14:52:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 14:52:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,847 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 14:52:40,847 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 3 case distinctions, treesize of input 258 treesize of output 246 [2022-12-14 14:52:40,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 14:52:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 14:52:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:52:40,943 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 14:52:40,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 14:52:41,035 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 14:52:41,035 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 25 treesize of output 25 [2022-12-14 14:52:41,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:52:41,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5117#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 20) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:52:41,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:52:41,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:52:41,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 117, 117] total 254 [2022-12-14 14:52:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948877371] [2022-12-14 14:52:41,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:52:41,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2022-12-14 14:52:41,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2022-12-14 14:52:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2022-12-14 14:52:41,218 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 254 states, 254 states have (on average 1.1181102362204725) internal successors, (284), 254 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:47,678 INFO L93 Difference]: Finished difference Result 698 states and 862 transitions. [2022-12-14 14:52:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-12-14 14:52:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 254 states have (on average 1.1181102362204725) internal successors, (284), 254 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-12-14 14:52:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:47,681 INFO L225 Difference]: With dead ends: 698 [2022-12-14 14:52:47,681 INFO L226 Difference]: Without dead ends: 651 [2022-12-14 14:52:47,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38173 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2022-12-14 14:52:47,685 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1380 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:47,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1380 Valid, 375 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 14:52:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-12-14 14:52:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 325. [2022-12-14 14:52:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0092592592592593) internal successors, (327), 324 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 327 transitions. [2022-12-14 14:52:47,705 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 327 transitions. Word has length 162 [2022-12-14 14:52:47,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:47,706 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 327 transitions. [2022-12-14 14:52:47,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 254 states have (on average 1.1181102362204725) internal successors, (284), 254 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 327 transitions. [2022-12-14 14:52:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-12-14 14:52:47,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:47,713 INFO L195 NwaCegarLoop]: trace histogram [251, 66, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:47,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:52:47,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:47,914 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1291070865, now seen corresponding path program 8 times [2022-12-14 14:52:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:47,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443845848] [2022-12-14 14:52:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:47,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 33837 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2022-12-14 14:52:52,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:52,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443845848] [2022-12-14 14:52:52,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443845848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:52,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029203201] [2022-12-14 14:52:52,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:52:52,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:52,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:52,004 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:52,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74ae7a1-2e55-4def-ac38-3851fc70cbc4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process