./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_04.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_04.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur --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 707ac1569fc13aaf70722a6e3f0da30ae8a39e673c650cb4b45c765a74a9f24d --- 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-38b53e6 [2022-11-25 22:33:45,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:33:45,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:33:45,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:33:45,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:33:45,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:33:45,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:33:46,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:33:46,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:33:46,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:33:46,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:33:46,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:33:46,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:33:46,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:33:46,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:33:46,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:33:46,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:33:46,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:33:46,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:33:46,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:33:46,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:33:46,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:33:46,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:33:46,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:33:46,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:33:46,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:33:46,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:33:46,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:33:46,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:33:46,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:33:46,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:33:46,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:33:46,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:33:46,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:33:46,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:33:46,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:33:46,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:33:46,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:33:46,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:33:46,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:33:46,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:33:46,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:33:46,099 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:33:46,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:33:46,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:33:46,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:33:46,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:33:46,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:33:46,105 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:33:46,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:33:46,105 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:33:46,106 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:33:46,107 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:33:46,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:33:46,107 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:33:46,108 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:33:46,108 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:33:46,108 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:33:46,108 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:33:46,109 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:33:46,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:33:46,110 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:33:46,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:33:46,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:33:46,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:33:46,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:33:46,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:33:46,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:33:46,112 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:33:46,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:33:46,112 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:33:46,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:33:46,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:33:46,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:33:46,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:33:46,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:33:46,114 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:33:46,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:33:46,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:33:46,115 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:33:46,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:33:46,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:33:46,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:33:46,116 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_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 707ac1569fc13aaf70722a6e3f0da30ae8a39e673c650cb4b45c765a74a9f24d [2022-11-25 22:33:46,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:33:46,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:33:46,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:33:46,453 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:33:46,453 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:33:46,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/standard_two_index_04.i [2022-11-25 22:33:49,419 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:33:49,633 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:33:49,633 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/sv-benchmarks/c/array-examples/standard_two_index_04.i [2022-11-25 22:33:49,644 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/data/c4dddaa9c/50c2ccbe6de544da85e0826585799664/FLAG4fa0779fb [2022-11-25 22:33:49,660 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/data/c4dddaa9c/50c2ccbe6de544da85e0826585799664 [2022-11-25 22:33:49,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:33:49,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:33:49,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:33:49,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:33:49,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:33:49,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:49,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@664560ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49, skipping insertion in model container [2022-11-25 22:33:49,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:49,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:33:49,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:33:49,904 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_9c172826-720e-4a6b-8393-65782f7561e6/sv-benchmarks/c/array-examples/standard_two_index_04.i[814,827] [2022-11-25 22:33:49,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:33:49,935 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:33:49,951 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_9c172826-720e-4a6b-8393-65782f7561e6/sv-benchmarks/c/array-examples/standard_two_index_04.i[814,827] [2022-11-25 22:33:49,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:33:49,983 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:33:49,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49 WrapperNode [2022-11-25 22:33:49,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:33:49,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:33:49,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:33:49,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:33:49,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,025 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-25 22:33:50,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:33:50,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:33:50,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:33:50,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:33:50,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,071 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:33:50,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:33:50,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:33:50,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:33:50,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (1/1) ... [2022-11-25 22:33:50,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:33:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:50,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:33:50,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:33:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:33:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:33:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:33:50,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:33:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:33:50,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:33:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:33:50,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:33:50,252 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:33:50,254 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:33:50,416 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:33:50,464 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:33:50,468 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 22:33:50,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:33:50 BoogieIcfgContainer [2022-11-25 22:33:50,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:33:50,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:33:50,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:33:50,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:33:50,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:33:49" (1/3) ... [2022-11-25 22:33:50,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314d7831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:33:50, skipping insertion in model container [2022-11-25 22:33:50,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:49" (2/3) ... [2022-11-25 22:33:50,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314d7831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:33:50, skipping insertion in model container [2022-11-25 22:33:50,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:33:50" (3/3) ... [2022-11-25 22:33:50,485 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2022-11-25 22:33:50,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:33:50,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:33:50,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:33:50,592 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;@41dd6895, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:33:50,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:33:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:33:50,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:50,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 22:33:50,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:50,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1776518481, now seen corresponding path program 1 times [2022-11-25 22:33:50,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:50,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874150761] [2022-11-25 22:33:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:50,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:33:50,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:50,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874150761] [2022-11-25 22:33:50,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874150761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:50,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:50,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:33:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983596570] [2022-11-25 22:33:50,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:50,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:33:50,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:33:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:33:50,928 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:50,998 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-25 22:33:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:33:51,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 22:33:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:51,008 INFO L225 Difference]: With dead ends: 17 [2022-11-25 22:33:51,008 INFO L226 Difference]: Without dead ends: 9 [2022-11-25 22:33:51,011 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 [2022-11-25 22:33:51,014 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:51,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:33:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-25 22:33:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-25 22:33:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-25 22:33:51,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-11-25 22:33:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:51,070 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-25 22:33:51,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-25 22:33:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:33:51,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:51,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:51,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:33:51,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:51,074 INFO L85 PathProgramCache]: Analyzing trace with hash -612832272, now seen corresponding path program 1 times [2022-11-25 22:33:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:51,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655191987] [2022-11-25 22:33:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:51,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:33:51,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:51,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655191987] [2022-11-25 22:33:51,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655191987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:51,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315015352] [2022-11-25 22:33:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:51,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:51,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:51,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:51,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:33:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:33:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:51,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:33:51,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315015352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:51,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:33:51,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 22:33:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074058570] [2022-11-25 22:33:51,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:33:51,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:33:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:33:51,335 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:51,374 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-25 22:33:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:33:51,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:33:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:51,377 INFO L225 Difference]: With dead ends: 20 [2022-11-25 22:33:51,377 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 22:33:51,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:33:51,381 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:51,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:33:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 22:33:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-11-25 22:33:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-25 22:33:51,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-25 22:33:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:51,386 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-25 22:33:51,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-25 22:33:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:33:51,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:51,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:51,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:51,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:51,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1851389444, now seen corresponding path program 1 times [2022-11-25 22:33:51,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:51,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153767111] [2022-11-25 22:33:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:51,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:51,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153767111] [2022-11-25 22:33:51,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153767111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018695008] [2022-11-25 22:33:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:51,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:51,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:51,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:51,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:33:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:51,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:33:51,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:51,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:33:51,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018695008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:51,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362426160] [2022-11-25 22:33:51,848 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:33:51,849 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:51,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:51,858 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:51,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:51,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,014 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-25 22:33:52,015 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 [2022-11-25 22:33:52,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,111 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 22:33:52,111 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 [2022-11-25 22:33:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:33:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:52,379 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:33:52,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-25 22:33:52,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:33:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-25 22:33:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,739 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-25 22:33:52,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-25 22:33:52,886 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-25 22:33:52,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:33:52,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:53,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:53,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:53,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:33:53,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 22:33:53,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549486036] [2022-11-25 22:33:53,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:53,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:33:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:53,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:33:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:33:53,127 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:53,178 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-25 22:33:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:33:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 22:33:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:53,180 INFO L225 Difference]: With dead ends: 31 [2022-11-25 22:33:53,180 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 22:33:53,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:33:53,181 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:53,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:33:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 22:33:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-11-25 22:33:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-25 22:33:53,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-25 22:33:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:53,187 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-25 22:33:53,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-25 22:33:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 22:33:53,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:53,188 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:53,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:53,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1413922641, now seen corresponding path program 2 times [2022-11-25 22:33:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61755170] [2022-11-25 22:33:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:53,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:33:53,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:53,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61755170] [2022-11-25 22:33:53,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61755170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:53,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938245504] [2022-11-25 22:33:53,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:33:53,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:53,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:53,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:33:53,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:33:53,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:33:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:33:53,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:33:53,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:33:53,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938245504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:53,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [443619899] [2022-11-25 22:33:53,741 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:33:53,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:53,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:53,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:53,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:53,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:53,804 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-25 22:33:53,805 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 [2022-11-25 22:33:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:53,875 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 22:33:53,877 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 [2022-11-25 22:33:53,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:53,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:33:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:54,033 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:33:54,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-25 22:33:54,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:33:54,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:54,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-25 22:33:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:54,303 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-25 22:33:54,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-25 22:33:54,441 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-25 22:33:54,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:33:54,455 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:54,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:54,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:54,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:33:54,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 22:33:54,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156340457] [2022-11-25 22:33:54,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:54,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:33:54,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:54,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:33:54,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:33:54,607 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:54,681 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-11-25 22:33:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:33:54,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 22:33:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:54,683 INFO L225 Difference]: With dead ends: 54 [2022-11-25 22:33:54,683 INFO L226 Difference]: Without dead ends: 46 [2022-11-25 22:33:54,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:33:54,684 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:54,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-25 22:33:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-11-25 22:33:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-25 22:33:54,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-11-25 22:33:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:54,690 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-25 22:33:54,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-25 22:33:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 22:33:54,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:54,691 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:54,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:54,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:54,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1373793359, now seen corresponding path program 3 times [2022-11-25 22:33:54,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:54,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920019677] [2022-11-25 22:33:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:54,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:33:55,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:55,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920019677] [2022-11-25 22:33:55,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920019677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:55,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419921114] [2022-11-25 22:33:55,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:33:55,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:55,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:55,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:33:55,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:33:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:33:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:33:55,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:33:55,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 22:33:55,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419921114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:55,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157037273] [2022-11-25 22:33:55,299 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:33:55,299 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:55,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:55,300 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:55,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:55,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:55,365 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 22:33:55,365 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 [2022-11-25 22:33:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:55,380 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 [2022-11-25 22:33:55,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:55,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:33:55,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:55,515 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 22:33:55,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-25 22:33:55,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:33:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:55,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:33:55,682 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-11-25 22:33:55,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2022-11-25 22:33:55,737 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-25 22:33:55,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:33:55,755 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:55,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '555#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:55,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:55,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:33:55,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-11-25 22:33:55,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706341002] [2022-11-25 22:33:55,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:55,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 22:33:55,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 22:33:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:33:55,952 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:56,084 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-11-25 22:33:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:33:56,084 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-25 22:33:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:56,085 INFO L225 Difference]: With dead ends: 93 [2022-11-25 22:33:56,085 INFO L226 Difference]: Without dead ends: 81 [2022-11-25 22:33:56,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:33:56,087 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 83 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:56,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 48 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-25 22:33:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 36. [2022-11-25 22:33:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-11-25 22:33:56,094 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2022-11-25 22:33:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:56,094 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-11-25 22:33:56,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-11-25 22:33:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 22:33:56,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:56,096 INFO L195 NwaCegarLoop]: trace histogram [19, 9, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:56,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 22:33:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:56,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1806525724, now seen corresponding path program 4 times [2022-11-25 22:33:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581901995] [2022-11-25 22:33:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:56,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-25 22:33:56,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581901995] [2022-11-25 22:33:56,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581901995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024559535] [2022-11-25 22:33:56,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:33:56,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:56,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:56,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:56,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:33:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 22:33:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 22:33:56,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 22:33:57,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024559535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:57,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094006667] [2022-11-25 22:33:57,456 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:33:57,456 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:57,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:57,457 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:57,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:57,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,506 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-25 22:33:57,507 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 [2022-11-25 22:33:57,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,559 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 22:33:57,559 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 [2022-11-25 22:33:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 22:33:57,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,667 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 22:33:57,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-25 22:33:57,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:33:57,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-25 22:33:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,865 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-25 22:33:57,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-25 22:33:57,964 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-25 22:33:57,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:33:57,976 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:58,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1014#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:58,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:58,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:33:58,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 48 [2022-11-25 22:33:58,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837288] [2022-11-25 22:33:58,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:58,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 22:33:58,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:58,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 22:33:58,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:33:58,188 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:58,463 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2022-11-25 22:33:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 22:33:58,464 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-25 22:33:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:58,468 INFO L225 Difference]: With dead ends: 158 [2022-11-25 22:33:58,468 INFO L226 Difference]: Without dead ends: 143 [2022-11-25 22:33:58,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:33:58,472 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 195 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:58,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 84 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:33:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-25 22:33:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 68. [2022-11-25 22:33:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-11-25 22:33:58,498 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 34 [2022-11-25 22:33:58,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:58,498 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-11-25 22:33:58,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:33:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-11-25 22:33:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 22:33:58,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:58,503 INFO L195 NwaCegarLoop]: trace histogram [45, 15, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:58,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:58,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:58,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1491282492, now seen corresponding path program 5 times [2022-11-25 22:33:58,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:58,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494882055] [2022-11-25 22:33:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-25 22:33:59,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:59,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494882055] [2022-11-25 22:33:59,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494882055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:59,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401756591] [2022-11-25 22:33:59,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:33:59,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:59,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:59,397 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:59,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:34:03,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 22:34:03,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:34:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:34:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-25 22:34:03,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-25 22:34:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401756591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:03,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1582156219] [2022-11-25 22:34:03,859 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:34:03,859 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:03,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:03,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:03,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:03,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:03,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:03,915 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 22:34:03,915 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 [2022-11-25 22:34:03,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:03,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:03,929 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 [2022-11-25 22:34:03,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:03,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:34:04,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:04,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:04,041 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:34:04,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-25 22:34:04,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:34:04,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:04,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-25 22:34:04,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:04,231 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-11-25 22:34:04,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-11-25 22:34:04,314 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-25 22:34:04,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:34:04,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:04,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1822#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:04,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:04,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:34:04,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-11-25 22:34:04,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723762630] [2022-11-25 22:34:04,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:04,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 22:34:04,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 22:34:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=847, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 22:34:04,475 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:34:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:04,828 INFO L93 Difference]: Finished difference Result 246 states and 265 transitions. [2022-11-25 22:34:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 22:34:04,829 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-25 22:34:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:04,830 INFO L225 Difference]: With dead ends: 246 [2022-11-25 22:34:04,830 INFO L226 Difference]: Without dead ends: 241 [2022-11-25 22:34:04,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=713, Invalid=847, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 22:34:04,832 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 436 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:04,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 96 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:34:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-25 22:34:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 85. [2022-11-25 22:34:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 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) [2022-11-25 22:34:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-11-25 22:34:04,841 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 66 [2022-11-25 22:34:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:04,842 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-11-25 22:34:04,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:34:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-11-25 22:34:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 22:34:04,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:04,844 INFO L195 NwaCegarLoop]: trace histogram [45, 32, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:04,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:05,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash -331046608, now seen corresponding path program 6 times [2022-11-25 22:34:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726214492] [2022-11-25 22:34:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-25 22:34:06,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726214492] [2022-11-25 22:34:06,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726214492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:06,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339896478] [2022-11-25 22:34:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:34:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:06,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:06,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:34:06,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:34:06,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:34:06,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 22:34:06,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-11-25 22:34:07,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-11-25 22:34:09,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339896478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:09,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148207495] [2022-11-25 22:34:09,838 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:34:09,838 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:09,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:09,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:09,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:09,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:09,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:09,891 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-25 22:34:09,891 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 [2022-11-25 22:34:09,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:09,944 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 22:34:09,945 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 [2022-11-25 22:34:09,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:09,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:34:10,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:10,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:10,063 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:34:10,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-25 22:34:10,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:34:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:10,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:34:10,299 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-11-25 22:34:10,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2022-11-25 22:34:10,362 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-25 22:34:10,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:34:10,382 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:10,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2959#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:10,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:10,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:34:10,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 47, 47] total 116 [2022-11-25 22:34:10,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041934448] [2022-11-25 22:34:10,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:10,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-25 22:34:10,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-25 22:34:10,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7027, Invalid=7493, Unknown=0, NotChecked=0, Total=14520 [2022-11-25 22:34:10,574 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:34:12,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:12,137 INFO L93 Difference]: Finished difference Result 429 states and 513 transitions. [2022-11-25 22:34:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-25 22:34:12,143 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-25 22:34:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:12,150 INFO L225 Difference]: With dead ends: 429 [2022-11-25 22:34:12,150 INFO L226 Difference]: Without dead ends: 391 [2022-11-25 22:34:12,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7229 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7027, Invalid=7493, Unknown=0, NotChecked=0, Total=14520 [2022-11-25 22:34:12,159 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 999 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:12,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 207 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:34:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-25 22:34:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 166. [2022-11-25 22:34:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:34:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-11-25 22:34:12,189 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 83 [2022-11-25 22:34:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:12,190 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-11-25 22:34:12,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:34:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-11-25 22:34:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-25 22:34:12,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:12,192 INFO L195 NwaCegarLoop]: trace histogram [113, 45, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:12,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 22:34:12,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:12,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2085187588, now seen corresponding path program 7 times [2022-11-25 22:34:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170431529] [2022-11-25 22:34:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:12,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7476 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2022-11-25 22:34:15,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:15,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170431529] [2022-11-25 22:34:15,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170431529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:15,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143492474] [2022-11-25 22:34:15,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:34:15,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:15,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:15,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:15,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:34:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:16,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-25 22:34:16,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7476 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-25 22:34:17,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7476 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-25 22:34:27,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143492474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:27,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194570369] [2022-11-25 22:34:27,521 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:34:27,521 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:27,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:27,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:27,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:27,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:27,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:27,571 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 22:34:27,572 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 [2022-11-25 22:34:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:27,583 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 [2022-11-25 22:34:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:27,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 22:34:27,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:27,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:27,692 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 22:34:27,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-25 22:34:27,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:34:27,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:27,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-25 22:34:27,881 INFO L321 Elim1Store]: treesize reduction 120, result has 23.1 percent of original size [2022-11-25 22:34:27,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 102 [2022-11-25 22:34:27,927 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-25 22:34:27,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:34:27,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:28,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5186#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4 (* 16 |ULTIMATE.start_main_~j~0#1|)))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:28,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:28,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:34:28,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 115, 115] total 248 [2022-11-25 22:34:28,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239215239] [2022-11-25 22:34:28,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:28,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 248 states [2022-11-25 22:34:28,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:28,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2022-11-25 22:34:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31381, Invalid=32375, Unknown=0, NotChecked=0, Total=63756 [2022-11-25 22:34:28,151 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 248 states, 248 states have (on average 1.1451612903225807) internal successors, (284), 248 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:34:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:36,550 INFO L93 Difference]: Finished difference Result 754 states and 919 transitions. [2022-11-25 22:34:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2022-11-25 22:34:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 248 states, 248 states have (on average 1.1451612903225807) internal successors, (284), 248 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-11-25 22:34:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:36,554 INFO L225 Difference]: With dead ends: 754 [2022-11-25 22:34:36,555 INFO L226 Difference]: Without dead ends: 703 [2022-11-25 22:34:36,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34389 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=31381, Invalid=32375, Unknown=0, NotChecked=0, Total=63756 [2022-11-25 22:34:36,561 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1363 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:36,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 390 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:34:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-11-25 22:34:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 328. [2022-11-25 22:34:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:34:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2022-11-25 22:34:36,589 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 164 [2022-11-25 22:34:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:36,590 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2022-11-25 22:34:36,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 248 states, 248 states have (on average 1.1451612903225807) internal successors, (284), 248 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:34:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2022-11-25 22:34:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-25 22:34:36,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:36,596 INFO L195 NwaCegarLoop]: trace histogram [245, 75, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:36,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 22:34:36,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:34:36,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1270733244, now seen corresponding path program 8 times [2022-11-25 22:34:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:36,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031226783] [2022-11-25 22:34:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32985 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 30135 trivial. 0 not checked. [2022-11-25 22:34:44,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:44,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031226783] [2022-11-25 22:34:44,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031226783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:44,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580946375] [2022-11-25 22:34:44,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:34:44,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:44,564 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:44,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c172826-720e-4a6b-8393-65782f7561e6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process