./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcmp_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/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_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcmp_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/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_80e9a9ab-d050-4273-a6c5-1958393ef0cd/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 c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:58:37,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:58:37,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:58:37,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:58:37,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:58:37,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:58:37,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:58:37,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:58:37,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:58:37,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:58:37,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:58:37,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:58:37,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:58:37,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:58:37,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:58:37,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:58:37,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:58:37,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:58:37,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:58:37,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:58:37,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:58:37,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:58:37,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:58:37,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:58:37,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:58:37,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:58:37,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:58:37,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:58:37,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:58:37,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:58:37,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:58:37,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:58:37,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:58:37,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:58:37,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:58:37,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:58:37,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:58:37,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:58:37,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:58:37,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:58:37,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:58:37,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:58:37,785 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:58:37,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:58:37,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:58:37,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:58:37,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:58:37,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:58:37,792 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:58:37,792 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:58:37,793 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:58:37,793 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:58:37,793 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:58:37,793 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:58:37,793 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:58:37,793 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:58:37,793 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:58:37,794 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:58:37,794 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:58:37,794 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:58:37,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:58:37,795 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:58:37,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:58:37,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:58:37,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:58:37,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:58:37,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:58:37,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:58:37,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:58:37,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:58:37,796 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:58:37,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:58:37,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:58:37,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:58:37,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:58:37,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:58:37,797 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:58:37,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:58:37,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:58:37,797 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:58:37,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:58:37,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:58:37,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:58:37,797 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_80e9a9ab-d050-4273-a6c5-1958393ef0cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 [2022-12-14 13:58:37,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:58:37,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:58:37,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:58:37,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:58:37,976 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:58:37,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2022-12-14 13:58:40,670 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:58:40,815 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:58:40,815 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2022-12-14 13:58:40,820 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/data/fab16f124/b5e441572842409196b32edf98676046/FLAG9d0322704 [2022-12-14 13:58:40,833 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/data/fab16f124/b5e441572842409196b32edf98676046 [2022-12-14 13:58:40,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:58:40,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:58:40,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:58:40,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:58:40,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:58:40,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:58:40" (1/1) ... [2022-12-14 13:58:40,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5edde610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:40, skipping insertion in model container [2022-12-14 13:58:40,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:58:40" (1/1) ... [2022-12-14 13:58:40,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:58:40,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:58:40,988 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_80e9a9ab-d050-4273-a6c5-1958393ef0cd/sv-benchmarks/c/array-examples/standard_strcmp_ground.i[815,828] [2022-12-14 13:58:40,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:58:41,006 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:58:41,015 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_80e9a9ab-d050-4273-a6c5-1958393ef0cd/sv-benchmarks/c/array-examples/standard_strcmp_ground.i[815,828] [2022-12-14 13:58:41,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:58:41,032 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:58:41,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41 WrapperNode [2022-12-14 13:58:41,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:58:41,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:58:41,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:58:41,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:58:41,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,058 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-12-14 13:58:41,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:58:41,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:58:41,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:58:41,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:58:41,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,075 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:58:41,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:58:41,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:58:41,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:58:41,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (1/1) ... [2022-12-14 13:58:41,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:58:41,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:41,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:58:41,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:58:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:58:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:58:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:58:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:58:41,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:58:41,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:58:41,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:58:41,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:58:41,197 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:58:41,199 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:58:41,301 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:58:41,320 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:58:41,321 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 13:58:41,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:58:41 BoogieIcfgContainer [2022-12-14 13:58:41,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:58:41,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:58:41,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:58:41,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:58:41,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:58:40" (1/3) ... [2022-12-14 13:58:41,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1617fb88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:58:41, skipping insertion in model container [2022-12-14 13:58:41,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:58:41" (2/3) ... [2022-12-14 13:58:41,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1617fb88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:58:41, skipping insertion in model container [2022-12-14 13:58:41,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:58:41" (3/3) ... [2022-12-14 13:58:41,332 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2022-12-14 13:58:41,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:58:41,351 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:58:41,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:58:41,408 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;@485801ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:58:41,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:58:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:58:41,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:41,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:41,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash -715237656, now seen corresponding path program 1 times [2022-12-14 13:58:41,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:41,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901243301] [2022-12-14 13:58:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:41,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:58:41,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:41,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901243301] [2022-12-14 13:58:41,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901243301] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:58:41,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:58:41,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:58:41,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419582744] [2022-12-14 13:58:41,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:58:41,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:58:41,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:58:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:58:41,645 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:41,675 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2022-12-14 13:58:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:58:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 13:58:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:41,682 INFO L225 Difference]: With dead ends: 25 [2022-12-14 13:58:41,682 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 13:58:41,684 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 13:58:41,687 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:41,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 13:58:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 13:58:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-12-14 13:58:41,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-12-14 13:58:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:41,709 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-12-14 13:58:41,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-12-14 13:58:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:58:41,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:41,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:41,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:58:41,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash 352703344, now seen corresponding path program 1 times [2022-12-14 13:58:41,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:41,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341433015] [2022-12-14 13:58:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:41,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:41,785 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 13:58:41,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341433015] [2022-12-14 13:58:41,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341433015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526417339] [2022-12-14 13:58:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:41,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:41,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:41,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:58:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:58:41,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:41,866 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 13:58:41,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:58:41,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526417339] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:58:41,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:58:41,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 13:58:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066668195] [2022-12-14 13:58:41,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:58:41,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:58:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:58:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:58:41,869 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:41,887 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-12-14 13:58:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:58:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 13:58:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:41,888 INFO L225 Difference]: With dead ends: 28 [2022-12-14 13:58:41,888 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 13:58:41,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:58:41,889 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:41,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 13:58:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2022-12-14 13:58:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 13:58:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-12-14 13:58:41,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-12-14 13:58:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:41,892 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-12-14 13:58:41,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-12-14 13:58:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:58:41,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:41,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:41,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:58:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:42,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash -201190691, now seen corresponding path program 1 times [2022-12-14 13:58:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:42,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941359991] [2022-12-14 13:58:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:42,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:42,263 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 13:58:42,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:42,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941359991] [2022-12-14 13:58:42,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941359991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:42,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936300543] [2022-12-14 13:58:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:42,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:42,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:42,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:58:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:58:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:42,346 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 13:58:42,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:42,362 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 13:58:42,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936300543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865926230] [2022-12-14 13:58:42,377 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:58:42,377 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:42,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:42,384 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:42,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:42,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:42,479 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:42,480 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 13:58:42,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:42,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:42,496 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 13:58:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:42,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-12-14 13:58:42,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:42,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:42,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:42,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:42,741 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:58:42,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-12-14 13:58:42,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:42,995 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:42,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:43,027 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:58:43,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1865926230] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:58:43,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:58:43,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2022-12-14 13:58:43,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875034700] [2022-12-14 13:58:43,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:58:43,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:58:43,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:43,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:58:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:58:43,205 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:43,256 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-12-14 13:58:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:58:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 13:58:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:43,257 INFO L225 Difference]: With dead ends: 21 [2022-12-14 13:58:43,257 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 13:58:43,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:58:43,258 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:43,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 13:58:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 13:58:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-12-14 13:58:43,261 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2022-12-14 13:58:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:43,262 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-12-14 13:58:43,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-12-14 13:58:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:58:43,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:43,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:43,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:58:43,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:43,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:43,466 INFO L85 PathProgramCache]: Analyzing trace with hash 975217493, now seen corresponding path program 1 times [2022-12-14 13:58:43,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:43,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370621915] [2022-12-14 13:58:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:43,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:43,650 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 13:58:43,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370621915] [2022-12-14 13:58:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370621915] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:43,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786347386] [2022-12-14 13:58:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:43,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:43,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:43,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:43,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:58:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:43,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:58:43,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:43,709 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 13:58:43,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:43,720 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 13:58:43,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786347386] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:43,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325053356] [2022-12-14 13:58:43,722 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:58:43,723 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:43,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:43,723 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:43,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,763 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:58:43,764 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 13:58:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,806 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:43,806 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 13:58:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 13:58:43,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:43,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:43,943 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:58:43,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 13:58:44,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:44,011 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:44,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:44,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:58:44,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '339#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:58:44,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:58:44,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:58:44,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 13:58:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655426201] [2022-12-14 13:58:44,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:58:44,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:58:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:58:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:58:44,646 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 13:58:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:44,663 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-12-14 13:58:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:58:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) Word has length 11 [2022-12-14 13:58:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:44,664 INFO L225 Difference]: With dead ends: 28 [2022-12-14 13:58:44,664 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 13:58:44,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:58:44,665 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:44,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 13:58:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 13:58:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-12-14 13:58:44,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-12-14 13:58:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:44,670 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-12-14 13:58:44,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 13:58:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-12-14 13:58:44,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:58:44,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:44,671 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:44,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:58:44,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:44,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:44,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1636529459, now seen corresponding path program 2 times [2022-12-14 13:58:44,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:44,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187068676] [2022-12-14 13:58:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:44,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:58:45,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:45,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187068676] [2022-12-14 13:58:45,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187068676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:45,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255140425] [2022-12-14 13:58:45,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:58:45,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:45,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:45,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:45,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:58:45,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:58:45,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:58:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:58:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:58:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:58:45,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255140425] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:45,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733910107] [2022-12-14 13:58:45,112 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:58:45,112 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:45,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:45,113 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:45,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:45,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,147 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:58:45,147 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 13:58:45,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,179 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:45,179 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 13:58:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 13:58:45,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:45,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:45,300 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:58:45,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 13:58:45,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:45,350 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:45,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:45,477 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:58:45,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '498#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:58:45,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:58:45,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:58:45,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 13:58:45,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216217327] [2022-12-14 13:58:45,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:58:45,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:58:45,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:58:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:58:45,913 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:45,938 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-12-14 13:58:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:58:45,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 13:58:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:45,939 INFO L225 Difference]: With dead ends: 50 [2022-12-14 13:58:45,939 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:58:45,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:58:45,940 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:45,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:58:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 22. [2022-12-14 13:58:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-12-14 13:58:45,945 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2022-12-14 13:58:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:45,945 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-12-14 13:58:45,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-12-14 13:58:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:58:45,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:45,945 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:45,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 13:58:46,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:46,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:46,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1737865440, now seen corresponding path program 1 times [2022-12-14 13:58:46,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:46,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643551118] [2022-12-14 13:58:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:46,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:58:46,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:46,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643551118] [2022-12-14 13:58:46,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643551118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:58:46,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:58:46,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:58:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767664286] [2022-12-14 13:58:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:58:46,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:58:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:58:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:58:46,209 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 13:58:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:46,228 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-12-14 13:58:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:58:46,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 13:58:46,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:46,229 INFO L225 Difference]: With dead ends: 29 [2022-12-14 13:58:46,229 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 13:58:46,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:58:46,229 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:46,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 13:58:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 13:58:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-12-14 13:58:46,238 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-12-14 13:58:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:46,238 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-12-14 13:58:46,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 13:58:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-12-14 13:58:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 13:58:46,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:46,238 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:46,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:58:46,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:46,239 INFO L85 PathProgramCache]: Analyzing trace with hash 141189372, now seen corresponding path program 3 times [2022-12-14 13:58:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:46,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663865381] [2022-12-14 13:58:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:46,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:58:46,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:46,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663865381] [2022-12-14 13:58:46,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663865381] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:46,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780326904] [2022-12-14 13:58:46,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:58:46,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:46,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:46,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:46,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:58:46,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:58:46,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:58:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:58:46,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:58:46,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:58:46,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780326904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:46,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928162784] [2022-12-14 13:58:46,446 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:58:46,446 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:46,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:46,446 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:46,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,483 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:46,484 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 13:58:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,492 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 13:58:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 13:58:46,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:46,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:46,593 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:58:46,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 13:58:46,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:46,645 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:46,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:46,731 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:58:47,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '823#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:58:47,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:58:47,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:58:47,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-12-14 13:58:47,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103338756] [2022-12-14 13:58:47,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:58:47,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:58:47,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:47,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:58:47,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:58:47,214 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:47,245 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-12-14 13:58:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:58:47,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 13:58:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:47,245 INFO L225 Difference]: With dead ends: 51 [2022-12-14 13:58:47,245 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 13:58:47,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:58:47,246 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:47,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 13:58:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 13:58:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-12-14 13:58:47,250 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 20 [2022-12-14 13:58:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:47,250 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-12-14 13:58:47,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-12-14 13:58:47,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:58:47,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:47,251 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:47,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:58:47,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:58:47,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash 536609826, now seen corresponding path program 4 times [2022-12-14 13:58:47,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:47,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512402730] [2022-12-14 13:58:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:47,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 13:58:47,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:47,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512402730] [2022-12-14 13:58:47,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512402730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:47,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41260919] [2022-12-14 13:58:47,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:58:47,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:47,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:47,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:58:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:47,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 13:58:47,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 13:58:47,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 13:58:47,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41260919] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:47,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836559019] [2022-12-14 13:58:47,707 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:58:47,707 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:47,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:47,707 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:47,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:47,741 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:58:47,741 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 13:58:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:47,776 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:47,777 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 13:58:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:47,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-12-14 13:58:47,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:47,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:47,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:47,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:47,885 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:58:47,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-12-14 13:58:48,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:48,053 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:48,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:48,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:58:48,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1168#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:58:48,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:58:48,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:58:48,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-14 13:58:48,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176794051] [2022-12-14 13:58:48,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:58:48,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 13:58:48,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 13:58:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-12-14 13:58:48,653 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:48,673 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-12-14 13:58:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:58:48,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 33 [2022-12-14 13:58:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:48,674 INFO L225 Difference]: With dead ends: 70 [2022-12-14 13:58:48,674 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 13:58:48,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-12-14 13:58:48,675 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:48,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 13:58:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-14 13:58:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-12-14 13:58:48,682 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2022-12-14 13:58:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:48,682 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-12-14 13:58:48,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-12-14 13:58:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 13:58:48,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:48,685 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:48,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:58:48,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:48,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash 126903194, now seen corresponding path program 5 times [2022-12-14 13:58:48,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:48,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001439157] [2022-12-14 13:58:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 13:58:49,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:49,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001439157] [2022-12-14 13:58:49,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001439157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:49,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189018695] [2022-12-14 13:58:49,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:58:49,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:49,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:49,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:49,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:58:49,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:58:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:58:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 13:58:49,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-12-14 13:58:49,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:49,526 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2022-12-14 13:58:49,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 75 [2022-12-14 13:58:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-12-14 13:58:49,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189018695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:49,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697042305] [2022-12-14 13:58:49,695 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 13:58:49,695 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:49,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:49,695 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:49,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:49,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:49,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:49,728 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:58:49,728 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 13:58:49,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:49,768 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:49,769 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 13:58:49,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:49,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:49,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-12-14 13:58:49,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:49,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:49,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:49,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:49,924 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:58:49,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-12-14 13:58:50,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:50,069 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:50,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:50,150 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:58:50,822 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1613#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:58:50,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:58:50,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:58:50,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 26 [2022-12-14 13:58:50,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439591945] [2022-12-14 13:58:50,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:58:50,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 13:58:50,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 13:58:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 13:58:50,823 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:51,139 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-12-14 13:58:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 13:58:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 13:58:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:51,140 INFO L225 Difference]: With dead ends: 75 [2022-12-14 13:58:51,140 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 13:58:51,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 13:58:51,142 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:51,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:58:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 13:58:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-12-14 13:58:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-12-14 13:58:51,149 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2022-12-14 13:58:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:51,149 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-12-14 13:58:51,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-12-14 13:58:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 13:58:51,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:51,150 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:51,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:58:51,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:51,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:51,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1008529534, now seen corresponding path program 1 times [2022-12-14 13:58:51,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:51,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843098267] [2022-12-14 13:58:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 13:58:51,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843098267] [2022-12-14 13:58:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843098267] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:51,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959497593] [2022-12-14 13:58:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:51,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:51,643 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:51,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:58:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:58:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 13:58:51,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 13:58:51,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959497593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356897392] [2022-12-14 13:58:51,902 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:58:51,902 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:51,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:51,902 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:51,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:51,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:51,929 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:51,929 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 13:58:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:51,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:51,937 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 13:58:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:51,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-12-14 13:58:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:51,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:51,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:52,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:52,056 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:58:52,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-12-14 13:58:52,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:52,202 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:52,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:52,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:58:52,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2133#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:58:52,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:58:52,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:58:52,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2022-12-14 13:58:52,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707264203] [2022-12-14 13:58:52,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:58:52,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 13:58:52,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 13:58:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:58:52,839 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:52,876 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-12-14 13:58:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 13:58:52,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 13:58:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:52,876 INFO L225 Difference]: With dead ends: 90 [2022-12-14 13:58:52,877 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 13:58:52,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:58:52,877 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:52,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:58:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 13:58:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-14 13:58:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-12-14 13:58:52,886 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 44 [2022-12-14 13:58:52,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:52,887 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-12-14 13:58:52,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-12-14 13:58:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 13:58:52,889 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:52,889 INFO L195 NwaCegarLoop]: trace histogram [28, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:52,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:58:53,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:58:53,091 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:53,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:53,093 INFO L85 PathProgramCache]: Analyzing trace with hash 409178378, now seen corresponding path program 2 times [2022-12-14 13:58:53,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:53,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242100171] [2022-12-14 13:58:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:53,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 13:58:53,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:53,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242100171] [2022-12-14 13:58:53,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242100171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:53,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180224937] [2022-12-14 13:58:53,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:58:53,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:53,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:53,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:53,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:58:54,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 13:58:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:58:54,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 13:58:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:54,085 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-12-14 13:58:54,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 82 [2022-12-14 13:58:54,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-12-14 13:58:54,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-12-14 13:58:54,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 25 [2022-12-14 13:58:54,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-12-14 13:58:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-12-14 13:58:54,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-12-14 13:58:55,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180224937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948218361] [2022-12-14 13:58:55,087 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:58:55,087 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:55,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:55,087 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:55,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:55,111 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:58:55,111 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 13:58:55,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:55,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:55,143 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:55,143 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 13:58:55,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:55,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:55,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-12-14 13:58:55,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:55,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:55,243 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:58:55,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-12-14 13:58:55,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:55,400 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:55,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:55,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:58:56,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2787#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:58:56,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:58:56,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:58:56,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10, 9] total 47 [2022-12-14 13:58:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176507403] [2022-12-14 13:58:56,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:58:56,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 13:58:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:58:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 13:58:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2471, Unknown=11, NotChecked=0, Total=3080 [2022-12-14 13:58:56,466 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:58,191 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|))) (and (or (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|v_ULTIMATE.start_main_~i~1#1_76| Int)) (and (let ((.cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_76| 4)))) (= (select .cse0 .cse1) (select v_DerPreprocessor_2 .cse1))) (= .cse2 (select (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base| v_DerPreprocessor_1) |c_ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_2) |c_ULTIMATE.start_main_~#a~0#1.base| v_DerPreprocessor_1) |c_ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_2) |c_ULTIMATE.start_main_~#a~0#1.base|)))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |c_ULTIMATE.start_main_~#a~0#1.base|)) (not (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select .cse2 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0))) is different from true [2022-12-14 13:58:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:58:58,200 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-12-14 13:58:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 13:58:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 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 59 [2022-12-14 13:58:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:58:58,200 INFO L225 Difference]: With dead ends: 101 [2022-12-14 13:58:58,200 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 13:58:58,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1586, Invalid=6387, Unknown=41, NotChecked=176, Total=8190 [2022-12-14 13:58:58,202 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 3 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:58:58,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 89 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 241 Invalid, 12 Unknown, 1 Unchecked, 0.2s Time] [2022-12-14 13:58:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 13:58:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-12-14 13:58:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-12-14 13:58:58,212 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2022-12-14 13:58:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:58:58,212 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-12-14 13:58:58,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:58:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-12-14 13:58:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 13:58:58,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:58:58,213 INFO L195 NwaCegarLoop]: trace histogram [29, 10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:58:58,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 13:58:58,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:58:58,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:58:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:58:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1787134942, now seen corresponding path program 3 times [2022-12-14 13:58:58,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:58:58,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14770703] [2022-12-14 13:58:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:58:58,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:58:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:58:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-12-14 13:58:59,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:58:59,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14770703] [2022-12-14 13:58:59,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14770703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:58:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88834387] [2022-12-14 13:58:59,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:58:59,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:59,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:59,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:59,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:58:59,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:58:59,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:58:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:58:59,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-12-14 13:58:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-12-14 13:58:59,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88834387] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:59,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [924452432] [2022-12-14 13:58:59,607 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:58:59,607 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:58:59,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:58:59,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:58:59,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:58:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,638 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:58:59,639 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 13:58:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,648 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 13:58:59,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 13:58:59,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:59,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:59,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:58:59,727 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:58:59,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 13:58:59,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:58:59,772 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:58:59,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:58:59,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:59:00,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3563#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:59:00,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:59:00,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:59:00,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13, 13] total 54 [2022-12-14 13:59:00,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92062238] [2022-12-14 13:59:00,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:59:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 13:59:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 13:59:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=2968, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 13:59:00,738 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:00,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:00,839 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2022-12-14 13:59:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 13:59:00,840 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 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 63 [2022-12-14 13:59:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:00,840 INFO L225 Difference]: With dead ends: 122 [2022-12-14 13:59:00,840 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 13:59:00,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 148 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=814, Invalid=2968, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 13:59:00,841 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:00,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 13:59:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-12-14 13:59:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-12-14 13:59:00,853 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 63 [2022-12-14 13:59:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:00,854 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-12-14 13:59:00,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-12-14 13:59:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 13:59:00,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:00,855 INFO L195 NwaCegarLoop]: trace histogram [30, 22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:59:00,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:59:01,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:59:01,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:01,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1164513322, now seen corresponding path program 4 times [2022-12-14 13:59:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:01,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112432614] [2022-12-14 13:59:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:01,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-12-14 13:59:01,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112432614] [2022-12-14 13:59:01,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112432614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011697209] [2022-12-14 13:59:01,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:59:01,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:01,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:01,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:01,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:59:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 13:59:01,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-12-14 13:59:01,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:59:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-12-14 13:59:02,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011697209] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:59:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767322265] [2022-12-14 13:59:02,809 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:59:02,809 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:59:02,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:59:02,810 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:59:02,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:59:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,843 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:59:02,844 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 13:59:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,882 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:59:02,882 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 13:59:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 13:59:02,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:02,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:02,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:02,956 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:59:02,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 13:59:02,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:03,005 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:59:03,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:59:03,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:59:04,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4500#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~c~0#1| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:59:04,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:59:04,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:59:04,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2022-12-14 13:59:04,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984037624] [2022-12-14 13:59:04,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:59:04,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 13:59:04,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 13:59:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2123, Invalid=3133, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 13:59:04,443 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 65 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:04,529 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2022-12-14 13:59:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 13:59:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-12-14 13:59:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:04,530 INFO L225 Difference]: With dead ends: 178 [2022-12-14 13:59:04,530 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 13:59:04,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 201 SyntacticMatches, 22 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2916 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2123, Invalid=3133, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 13:59:04,531 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:04,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:59:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 13:59:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-12-14 13:59:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-12-14 13:59:04,547 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 88 [2022-12-14 13:59:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:04,547 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-12-14 13:59:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-12-14 13:59:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 13:59:04,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:04,549 INFO L195 NwaCegarLoop]: trace histogram [62, 22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:59:04,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:59:04,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:59:04,750 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1355939798, now seen corresponding path program 5 times [2022-12-14 13:59:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:04,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877080090] [2022-12-14 13:59:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-12-14 13:59:07,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:07,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877080090] [2022-12-14 13:59:07,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877080090] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:07,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406921027] [2022-12-14 13:59:07,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:59:07,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:07,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:07,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:07,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:59:07,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 13:59:07,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:59:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 13:59:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 2314 trivial. 0 not checked. [2022-12-14 13:59:08,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:59:08,942 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-12-14 13:59:08,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 83 [2022-12-14 13:59:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 19 proven. 111 refuted. 0 times theorem prover too weak. 2314 trivial. 0 not checked. [2022-12-14 13:59:09,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406921027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:59:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101203016] [2022-12-14 13:59:09,428 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:59:09,428 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:59:09,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:59:09,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:59:09,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:59:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,456 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:59:09,456 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 13:59:09,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,489 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:59:09,489 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 13:59:09,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 13:59:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:09,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:09,595 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:59:09,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 13:59:09,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:09,652 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:59:09,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:59:09,797 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:59:10,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5814#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:59:10,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:59:10,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:59:10,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 12, 12] total 86 [2022-12-14 13:59:10,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334643808] [2022-12-14 13:59:10,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:59:10,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-14 13:59:10,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:10,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-14 13:59:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2225, Invalid=6705, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 13:59:10,958 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 86 states, 86 states have (on average 1.372093023255814) internal successors, (118), 86 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:13,473 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2022-12-14 13:59:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 13:59:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.372093023255814) internal successors, (118), 86 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-12-14 13:59:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:13,474 INFO L225 Difference]: With dead ends: 184 [2022-12-14 13:59:13,474 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 13:59:13,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5472 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6465, Invalid=20925, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 13:59:13,477 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:13,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:59:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 13:59:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-12-14 13:59:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-12-14 13:59:13,494 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 120 [2022-12-14 13:59:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:13,494 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-12-14 13:59:13,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.372093023255814) internal successors, (118), 86 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-12-14 13:59:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 13:59:13,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:13,495 INFO L195 NwaCegarLoop]: trace histogram [63, 22, 22, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:59:13,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:59:13,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:59:13,696 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:13,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1737198022, now seen corresponding path program 6 times [2022-12-14 13:59:13,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:13,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828243859] [2022-12-14 13:59:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:13,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2022-12-14 13:59:15,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:15,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828243859] [2022-12-14 13:59:15,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828243859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:15,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769009134] [2022-12-14 13:59:15,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:59:15,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:15,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:15,617 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:15,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:59:15,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:59:15,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:59:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:59:15,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-12-14 13:59:16,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:59:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-12-14 13:59:17,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769009134] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:59:17,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204633292] [2022-12-14 13:59:17,122 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:59:17,122 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:59:17,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:59:17,122 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:59:17,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:59:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:17,152 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:59:17,152 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 13:59:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:17,161 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 13:59:17,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:17,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:17,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-12-14 13:59:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:17,259 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:59:17,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-12-14 13:59:17,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:17,417 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:59:17,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:59:17,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:59:18,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7336#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:59:18,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:59:18,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:59:18,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 25, 25] total 112 [2022-12-14 13:59:18,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900460716] [2022-12-14 13:59:18,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:59:18,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-12-14 13:59:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-12-14 13:59:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=11195, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 13:59:18,548 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 112 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 112 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:18,718 INFO L93 Difference]: Finished difference Result 234 states and 262 transitions. [2022-12-14 13:59:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-12-14 13:59:18,719 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 112 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-12-14 13:59:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:18,719 INFO L225 Difference]: With dead ends: 234 [2022-12-14 13:59:18,719 INFO L226 Difference]: Without dead ends: 174 [2022-12-14 13:59:18,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4084 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3325, Invalid=11195, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 13:59:18,721 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:18,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-14 13:59:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-12-14 13:59:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0173410404624277) internal successors, (176), 173 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2022-12-14 13:59:18,741 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 124 [2022-12-14 13:59:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:18,741 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2022-12-14 13:59:18,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 112 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2022-12-14 13:59:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 13:59:18,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:18,743 INFO L195 NwaCegarLoop]: trace histogram [64, 46, 46, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:59:18,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:59:18,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:18,944 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:18,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1800136918, now seen corresponding path program 7 times [2022-12-14 13:59:18,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:18,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078264303] [2022-12-14 13:59:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:18,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-12-14 13:59:21,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:21,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078264303] [2022-12-14 13:59:21,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078264303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:21,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005755308] [2022-12-14 13:59:21,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:59:21,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:21,350 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:21,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:59:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:21,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 13:59:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-12-14 13:59:21,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:59:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-12-14 13:59:24,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005755308] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:59:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1257267273] [2022-12-14 13:59:24,629 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:59:24,629 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:59:24,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:59:24,630 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:59:24,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:59:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,656 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:59:24,656 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 13:59:24,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,682 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:59:24,682 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 13:59:24,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 13:59:24,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:24,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:24,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:24,763 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:59:24,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 13:59:24,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:24,807 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:59:24,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:59:24,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:59:28,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9180#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~c~0#1| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:59:28,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:59:28,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:59:28,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2022-12-14 13:59:28,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726247904] [2022-12-14 13:59:28,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:59:28,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-12-14 13:59:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-12-14 13:59:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8821, Invalid=10919, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 13:59:28,191 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand has 133 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 132 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:28,372 INFO L93 Difference]: Finished difference Result 348 states and 417 transitions. [2022-12-14 13:59:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-12-14 13:59:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 132 states have internal predecessors, (144), 0 states have call successors, (0), 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 173 [2022-12-14 13:59:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:28,373 INFO L225 Difference]: With dead ends: 348 [2022-12-14 13:59:28,373 INFO L226 Difference]: Without dead ends: 240 [2022-12-14 13:59:28,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 398 SyntacticMatches, 46 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10792 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8821, Invalid=10919, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 13:59:28,375 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:28,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-14 13:59:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-12-14 13:59:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-12-14 13:59:28,402 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 173 [2022-12-14 13:59:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:28,403 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-12-14 13:59:28,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 132 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-12-14 13:59:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-12-14 13:59:28,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:28,404 INFO L195 NwaCegarLoop]: trace histogram [130, 46, 46, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:59:28,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:59:28,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:59:28,606 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1953028054, now seen corresponding path program 8 times [2022-12-14 13:59:28,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:28,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969868213] [2022-12-14 13:59:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:28,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-12-14 13:59:37,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:37,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969868213] [2022-12-14 13:59:37,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969868213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:37,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434473986] [2022-12-14 13:59:37,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:59:37,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:37,222 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:37,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:59:39,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 13:59:39,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:59:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 13:59:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 0 proven. 367 refuted. 0 times theorem prover too weak. 10279 trivial. 0 not checked. [2022-12-14 13:59:40,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:59:41,674 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-12-14 13:59:41,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 83 [2022-12-14 13:59:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 42 proven. 325 refuted. 0 times theorem prover too weak. 10279 trivial. 0 not checked. [2022-12-14 13:59:42,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434473986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:59:42,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670277766] [2022-12-14 13:59:42,527 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:59:42,527 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:59:42,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:59:42,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:59:42,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:59:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,557 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 13:59:42,557 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 13:59:42,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,593 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 13:59:42,593 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 13:59:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 13:59:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:42,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:59:42,669 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:59:42,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 13:59:42,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:59:42,715 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:59:42,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 13:59:42,861 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:59:48,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11780#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:59:48,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:59:48,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:59:48,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 14, 14] total 158 [2022-12-14 13:59:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068260203] [2022-12-14 13:59:48,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:59:48,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-12-14 13:59:48,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-12-14 13:59:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8927, Invalid=18463, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 13:59:48,903 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 158 states, 158 states have (on average 1.240506329113924) internal successors, (196), 158 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:56,313 INFO L93 Difference]: Finished difference Result 354 states and 359 transitions. [2022-12-14 13:59:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-12-14 13:59:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.240506329113924) internal successors, (196), 158 states have internal predecessors, (196), 0 states have call successors, (0), 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 239 [2022-12-14 13:59:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:56,314 INFO L225 Difference]: With dead ends: 354 [2022-12-14 13:59:56,314 INFO L226 Difference]: Without dead ends: 246 [2022-12-14 13:59:56,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 637 SyntacticMatches, 46 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22836 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=26573, Invalid=66757, Unknown=0, NotChecked=0, Total=93330 [2022-12-14 13:59:56,319 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:56,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 138 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:59:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-12-14 13:59:56,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-12-14 13:59:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-12-14 13:59:56,358 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 239 [2022-12-14 13:59:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:56,359 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-12-14 13:59:56,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.240506329113924) internal successors, (196), 158 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:59:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-12-14 13:59:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-12-14 13:59:56,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:56,361 INFO L195 NwaCegarLoop]: trace histogram [131, 46, 46, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:59:56,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 13:59:56,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:59:56,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1798636074, now seen corresponding path program 9 times [2022-12-14 13:59:56,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:56,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586152563] [2022-12-14 13:59:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:56,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2022-12-14 14:00:05,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586152563] [2022-12-14 14:00:05,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586152563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301508241] [2022-12-14 14:00:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:00:05,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:05,338 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:05,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 14:00:05,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:00:05,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:00:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 2778 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 14:00:05,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 8672 trivial. 0 not checked. [2022-12-14 14:00:08,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:00:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 8672 trivial. 0 not checked. [2022-12-14 14:00:11,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301508241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:00:11,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059710826] [2022-12-14 14:00:11,316 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 14:00:11,316 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:00:11,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:00:11,316 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:00:11,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:00:11,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,352 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:00:11,353 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 14:00:11,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,364 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 14:00:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 14:00:11,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:00:11,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:00:11,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:11,465 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 14:00:11,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 14:00:11,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:00:11,514 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 14:00:11,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 14:00:11,641 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:00:13,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14769#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:00:13,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:00:13,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:00:13,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 49, 49] total 228 [2022-12-14 14:00:13,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17495691] [2022-12-14 14:00:13,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:00:13,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-12-14 14:00:13,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-12-14 14:00:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13523, Invalid=42409, Unknown=0, NotChecked=0, Total=55932 [2022-12-14 14:00:13,580 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 228 states, 228 states have (on average 1.4605263157894737) internal successors, (333), 228 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:00:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:14,159 INFO L93 Difference]: Finished difference Result 452 states and 504 transitions. [2022-12-14 14:00:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-12-14 14:00:14,160 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 1.4605263157894737) internal successors, (333), 228 states have internal predecessors, (333), 0 states have call successors, (0), 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 243 [2022-12-14 14:00:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:14,162 INFO L225 Difference]: With dead ends: 452 [2022-12-14 14:00:14,162 INFO L226 Difference]: Without dead ends: 341 [2022-12-14 14:00:14,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14760 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13523, Invalid=42409, Unknown=0, NotChecked=0, Total=55932 [2022-12-14 14:00:14,164 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:14,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:00:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-12-14 14:00:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2022-12-14 14:00:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.0088235294117647) internal successors, (343), 340 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:00:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 343 transitions. [2022-12-14 14:00:14,204 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 343 transitions. Word has length 243 [2022-12-14 14:00:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:14,204 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 343 transitions. [2022-12-14 14:00:14,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 1.4605263157894737) internal successors, (333), 228 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:00:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 343 transitions. [2022-12-14 14:00:14,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-12-14 14:00:14,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:14,205 INFO L195 NwaCegarLoop]: trace histogram [132, 94, 94, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:00:14,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 14:00:14,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 14:00:14,407 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1879164222, now seen corresponding path program 10 times [2022-12-14 14:00:14,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:14,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437357513] [2022-12-14 14:00:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:14,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-12-14 14:00:23,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:23,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437357513] [2022-12-14 14:00:23,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437357513] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:23,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371095311] [2022-12-14 14:00:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:00:23,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:23,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:23,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:23,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 14:00:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 3227 conjuncts, 134 conjunts are in the unsatisfiable core [2022-12-14 14:00:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-12-14 14:00:24,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:00:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-12-14 14:00:37,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371095311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:00:37,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347453637] [2022-12-14 14:00:37,270 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 14:00:37,270 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:00:37,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:00:37,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:00:37,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:00:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,293 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 14:00:37,293 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 14:00:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,323 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:00:37,323 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 14:00:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 14:00:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:00:37,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:00:37,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:00:37,404 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 14:00:37,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 14:00:37,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:00:37,447 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 14:00:37,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 14:00:37,570 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:00:38,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18395#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:00:38,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:00:38,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:00:38,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134, 134] total 268 [2022-12-14 14:00:38,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851125568] [2022-12-14 14:00:38,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:00:38,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 269 states [2022-12-14 14:00:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 269 interpolants. [2022-12-14 14:00:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36099, Invalid=40907, Unknown=0, NotChecked=0, Total=77006 [2022-12-14 14:00:39,004 INFO L87 Difference]: Start difference. First operand 341 states and 343 transitions. Second operand has 269 states, 269 states have (on average 1.0408921933085502) internal successors, (280), 268 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:00:39,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:39,739 INFO L93 Difference]: Finished difference Result 682 states and 819 transitions. [2022-12-14 14:00:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 268 states. [2022-12-14 14:00:39,740 INFO L78 Accepts]: Start accepts. Automaton has has 269 states, 269 states have (on average 1.0408921933085502) internal successors, (280), 268 states have internal predecessors, (280), 0 states have call successors, (0), 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 340 [2022-12-14 14:00:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:39,741 INFO L225 Difference]: With dead ends: 682 [2022-12-14 14:00:39,741 INFO L226 Difference]: Without dead ends: 475 [2022-12-14 14:00:39,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4135 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=36099, Invalid=40907, Unknown=0, NotChecked=0, Total=77006 [2022-12-14 14:00:39,744 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:39,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:00:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-12-14 14:00:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2022-12-14 14:00:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.0063291139240507) internal successors, (477), 474 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:00:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 477 transitions. [2022-12-14 14:00:39,799 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 477 transitions. Word has length 340 [2022-12-14 14:00:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:39,799 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 477 transitions. [2022-12-14 14:00:39,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 269 states, 269 states have (on average 1.0408921933085502) internal successors, (280), 268 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:00:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 477 transitions. [2022-12-14 14:00:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-12-14 14:00:39,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:39,801 INFO L195 NwaCegarLoop]: trace histogram [266, 94, 94, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:00:39,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 14:00:40,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:40,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 881817662, now seen corresponding path program 11 times [2022-12-14 14:00:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:40,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836197489] [2022-12-14 14:00:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:40,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:01:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 0 proven. 35511 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-12-14 14:01:18,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:01:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836197489] [2022-12-14 14:01:18,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836197489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:01:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089909802] [2022-12-14 14:01:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:01:18,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:01:18,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:01:18,097 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:01:18,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 14:01:22,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 14:01:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:01:22,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 14:01:22,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:01:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 0 proven. 941 refuted. 0 times theorem prover too weak. 43432 trivial. 0 not checked. [2022-12-14 14:01:26,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:01:27,664 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-12-14 14:01:27,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 83 [2022-12-14 14:01:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 89 proven. 852 refuted. 0 times theorem prover too weak. 43432 trivial. 0 not checked. [2022-12-14 14:01:28,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089909802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:01:28,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479230899] [2022-12-14 14:01:28,989 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 14:01:28,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:01:28,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:01:28,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:01:28,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:01:28,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,021 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:01:29,022 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 14:01:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,030 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 14:01:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 14:01:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:01:29,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:01:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:01:29,128 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 14:01:29,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 14:01:29,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:01:29,179 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 14:01:29,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 14:01:29,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:01:53,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23534#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~c~0#1| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:01:53,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:01:53,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:01:53,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [268, 16, 16] total 298 [2022-12-14 14:01:53,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512044773] [2022-12-14 14:01:53,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:01:53,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 298 states [2022-12-14 14:01:53,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:01:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 298 interpolants. [2022-12-14 14:01:53,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36210, Invalid=57120, Unknown=0, NotChecked=0, Total=93330 [2022-12-14 14:01:53,714 INFO L87 Difference]: Start difference. First operand 475 states and 477 transitions. Second operand has 298 states, 298 states have (on average 1.1476510067114094) internal successors, (342), 298 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:02:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:02:20,755 INFO L93 Difference]: Finished difference Result 688 states and 693 transitions. [2022-12-14 14:02:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 292 states. [2022-12-14 14:02:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 298 states, 298 states have (on average 1.1476510067114094) internal successors, (342), 298 states have internal predecessors, (342), 0 states have call successors, (0), 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 474 [2022-12-14 14:02:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:02:20,757 INFO L225 Difference]: With dead ends: 688 [2022-12-14 14:02:20,758 INFO L226 Difference]: Without dead ends: 481 [2022-12-14 14:02:20,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1290 SyntacticMatches, 94 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79636 ImplicationChecksByTransitivity, 70.4s TimeCoverageRelationStatistics Valid=108426, Invalid=233214, Unknown=0, NotChecked=0, Total=341640 [2022-12-14 14:02:20,772 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:02:20,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 168 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:02:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-12-14 14:02:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 479. [2022-12-14 14:02:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.006276150627615) internal successors, (481), 478 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:02:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 481 transitions. [2022-12-14 14:02:20,833 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 481 transitions. Word has length 474 [2022-12-14 14:02:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:02:20,833 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 481 transitions. [2022-12-14 14:02:20,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 298 states, 298 states have (on average 1.1476510067114094) internal successors, (342), 298 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:02:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 481 transitions. [2022-12-14 14:02:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-12-14 14:02:20,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:02:20,835 INFO L195 NwaCegarLoop]: trace histogram [267, 94, 94, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:02:20,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 14:02:21,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:02:21,037 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:02:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:02:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash -441189794, now seen corresponding path program 12 times [2022-12-14 14:02:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:02:21,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245980950] [2022-12-14 14:02:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:02:21,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:02:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:03:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 35778 refuted. 0 times theorem prover too weak. 8876 trivial. 0 not checked. [2022-12-14 14:03:01,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:03:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245980950] [2022-12-14 14:03:01,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245980950] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:03:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339983] [2022-12-14 14:03:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:03:01,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:03:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:03:01,019 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:03:01,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 14:03:02,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:03:02,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:03:02,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 5534 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 14:03:02,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:03:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 35818 trivial. 0 not checked. [2022-12-14 14:03:10,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:03:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 35818 trivial. 0 not checked. [2022-12-14 14:03:25,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:03:25,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538961543] [2022-12-14 14:03:25,571 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 14:03:25,571 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:03:25,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:03:25,571 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:03:25,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:03:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,607 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:03:25,607 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 14:03:25,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,616 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 14:03:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-12-14 14:03:25,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:03:25,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:03:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:03:25,708 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 14:03:25,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-12-14 14:03:25,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:03:25,762 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 14:03:25,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 14:03:25,922 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:03:54,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29431#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~c~0#1| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:03:54,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:03:54,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:03:54,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [269, 97, 97] total 460 [2022-12-14 14:03:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037932811] [2022-12-14 14:03:54,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:03:54,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 460 states [2022-12-14 14:03:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:03:54,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 460 interpolants. [2022-12-14 14:03:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54693, Invalid=163863, Unknown=0, NotChecked=0, Total=218556 [2022-12-14 14:03:54,451 INFO L87 Difference]: Start difference. First operand 479 states and 481 transitions. Second operand has 460 states, 460 states have (on average 1.4369565217391305) internal successors, (661), 460 states have internal predecessors, (661), 0 states have call successors, (0), 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 14:03:56,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:03:56,548 INFO L93 Difference]: Finished difference Result 882 states and 982 transitions. [2022-12-14 14:03:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 460 states. [2022-12-14 14:03:56,549 INFO L78 Accepts]: Start accepts. Automaton has has 460 states, 460 states have (on average 1.4369565217391305) internal successors, (661), 460 states have internal predecessors, (661), 0 states have call successors, (0), 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 478 [2022-12-14 14:03:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:03:56,550 INFO L225 Difference]: With dead ends: 882 [2022-12-14 14:03:56,550 INFO L226 Difference]: Without dead ends: 672 [2022-12-14 14:03:56,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1701 GetRequests, 1141 SyntacticMatches, 94 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106836 ImplicationChecksByTransitivity, 67.9s TimeCoverageRelationStatistics Valid=54693, Invalid=163863, Unknown=0, NotChecked=0, Total=218556 [2022-12-14 14:03:56,558 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:03:56,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:03:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-12-14 14:03:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2022-12-14 14:03:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.0044709388971684) internal successors, (674), 671 states have internal predecessors, (674), 0 states have call successors, (0), 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 14:03:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 674 transitions. [2022-12-14 14:03:56,639 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 674 transitions. Word has length 478 [2022-12-14 14:03:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:03:56,639 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 674 transitions. [2022-12-14 14:03:56,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 460 states, 460 states have (on average 1.4369565217391305) internal successors, (661), 460 states have internal predecessors, (661), 0 states have call successors, (0), 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 14:03:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 674 transitions. [2022-12-14 14:03:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-12-14 14:03:56,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:03:56,642 INFO L195 NwaCegarLoop]: trace histogram [268, 190, 190, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:03:56,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 14:03:56,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 14:03:56,843 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:03:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:03:56,845 INFO L85 PathProgramCache]: Analyzing trace with hash -158989562, now seen corresponding path program 13 times [2022-12-14 14:03:56,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:03:56,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006063011] [2022-12-14 14:03:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:03:56,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:03:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:04:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-12-14 14:04:42,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:04:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006063011] [2022-12-14 14:04:42,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006063011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:04:42,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60413384] [2022-12-14 14:04:42,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:04:42,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:04:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:04:42,396 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:04:42,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 14:04:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:04:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 6415 conjuncts, 270 conjunts are in the unsatisfiable core [2022-12-14 14:04:43,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:04:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-12-14 14:04:44,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:05:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-12-14 14:05:37,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60413384] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:05:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [716416858] [2022-12-14 14:05:37,661 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 14:05:37,661 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:05:37,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:05:37,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:05:37,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:05:37,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:05:37,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:05:37,686 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 14:05:37,686 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 14:05:37,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:05:37,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:05:37,715 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:05:37,715 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 14:05:37,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:05:37,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:05:37,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-12-14 14:05:37,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:05:37,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:05:37,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:05:37,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:05:37,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:05:37,817 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 14:05:37,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-12-14 14:05:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:05:37,975 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 14:05:37,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 14:05:38,102 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:06:15,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36590#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:06:15,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:06:15,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:06:15,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [270, 270, 270] total 540 [2022-12-14 14:06:15,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541513410] [2022-12-14 14:06:15,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:06:15,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 541 states [2022-12-14 14:06:15,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 541 interpolants. [2022-12-14 14:06:15,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146113, Invalid=154739, Unknown=0, NotChecked=0, Total=300852 [2022-12-14 14:06:15,967 INFO L87 Difference]: Start difference. First operand 672 states and 674 transitions. Second operand has 541 states, 541 states have (on average 1.0203327171903882) internal successors, (552), 540 states have internal predecessors, (552), 0 states have call successors, (0), 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 14:06:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:19,665 INFO L93 Difference]: Finished difference Result 1344 states and 1617 transitions. [2022-12-14 14:06:19,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 540 states. [2022-12-14 14:06:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 541 states, 541 states have (on average 1.0203327171903882) internal successors, (552), 540 states have internal predecessors, (552), 0 states have call successors, (0), 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 671 [2022-12-14 14:06:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:19,669 INFO L225 Difference]: With dead ends: 1344 [2022-12-14 14:06:19,669 INFO L226 Difference]: Without dead ends: 942 [2022-12-14 14:06:19,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2281 GetRequests, 1544 SyntacticMatches, 190 SemanticMatches, 547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160864 ImplicationChecksByTransitivity, 108.9s TimeCoverageRelationStatistics Valid=146113, Invalid=154739, Unknown=0, NotChecked=0, Total=300852 [2022-12-14 14:06:19,681 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:19,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:06:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-12-14 14:06:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2022-12-14 14:06:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 1.0031880977683316) internal successors, (944), 941 states have internal predecessors, (944), 0 states have call successors, (0), 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 14:06:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 944 transitions. [2022-12-14 14:06:19,819 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 944 transitions. Word has length 671 [2022-12-14 14:06:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:19,819 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 944 transitions. [2022-12-14 14:06:19,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 541 states, 541 states have (on average 1.0203327171903882) internal successors, (552), 540 states have internal predecessors, (552), 0 states have call successors, (0), 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 14:06:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 944 transitions. [2022-12-14 14:06:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2022-12-14 14:06:19,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:19,825 INFO L195 NwaCegarLoop]: trace histogram [538, 190, 190, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:06:19,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 14:06:20,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 14:06:20,026 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:20,027 INFO L85 PathProgramCache]: Analyzing trace with hash -908596218, now seen corresponding path program 14 times [2022-12-14 14:06:20,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:20,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927364101] [2022-12-14 14:06:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:20,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 181131 backedges. 0 proven. 144991 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-12-14 14:09:26,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:26,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927364101] [2022-12-14 14:09:26,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927364101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:09:26,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342719246] [2022-12-14 14:09:26,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:09:26,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:26,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:09:26,093 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:09:26,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80e9a9ab-d050-4273-a6c5-1958393ef0cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 14:09:35,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 14:09:35,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:09:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 14:09:35,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:09:37,018 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-12-14 14:09:37,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 82 [2022-12-14 14:09:37,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-12-14 14:09:37,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-12-14 14:09:37,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 25 [2022-12-14 14:09:37,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-12-14 14:09:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 181131 backedges. 538 proven. 2284 refuted. 0 times theorem prover too weak. 178309 trivial. 0 not checked. [2022-12-14 14:09:51,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:09:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 181131 backedges. 2214 proven. 70 refuted. 0 times theorem prover too weak. 178847 trivial. 0 not checked. [2022-12-14 14:09:56,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342719246] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:09:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788510239] [2022-12-14 14:09:56,382 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 14:09:56,382 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:09:56,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:09:56,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:09:56,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:09:56,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:09:56,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:09:56,416 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 14:09:56,416 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 14:09:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:09:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:09:56,424 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 14:09:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:09:56,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:09:56,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-12-14 14:09:56,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:09:56,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:09:56,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:09:56,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:09:56,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:09:56,529 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 14:09:56,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-12-14 14:09:56,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:09:56,681 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 14:09:56,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 14:09:56,803 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:11:23,290 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46771#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 14:11:23,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:11:23,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:11:23,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [540, 19, 18] total 575 [2022-12-14 14:11:23,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457931705] [2022-12-14 14:11:23,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:11:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 575 states [2022-12-14 14:11:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 575 interpolants. [2022-12-14 14:11:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146321, Invalid=192968, Unknown=17, NotChecked=0, Total=339306 [2022-12-14 14:11:23,335 INFO L87 Difference]: Start difference. First operand 942 states and 944 transitions. Second operand has 575 states, 575 states have (on average 1.0869565217391304) internal successors, (625), 575 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)