./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS --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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- 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-8393723 [2022-11-19 06:55:11,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:55:11,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:55:11,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:55:11,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:55:11,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:55:11,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:55:11,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:55:11,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:55:11,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:55:11,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:55:11,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:55:11,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:55:11,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:55:11,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:55:11,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:55:11,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:55:11,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:55:11,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:55:11,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:55:11,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:55:11,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:55:11,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:55:11,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:55:11,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:55:11,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:55:11,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:55:11,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:55:11,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:55:11,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:55:11,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:55:11,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:55:11,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:55:11,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:55:11,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:55:11,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:55:11,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:55:11,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:55:11,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:55:11,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:55:11,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:55:11,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:55:11,486 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:55:11,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:55:11,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:55:11,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:55:11,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:55:11,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:55:11,489 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:55:11,489 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:55:11,489 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:55:11,490 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:55:11,490 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:55:11,490 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:55:11,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:55:11,491 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:55:11,491 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:55:11,491 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:55:11,492 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:55:11,492 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:55:11,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:55:11,493 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:55:11,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:55:11,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:55:11,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:55:11,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:55:11,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:55:11,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:55:11,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:55:11,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:55:11,496 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:55:11,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:55:11,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:55:11,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:55:11,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:55:11,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:55:11,497 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:55:11,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:55:11,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:55:11,498 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:55:11,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:55:11,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:55:11,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:55:11,499 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_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2022-11-19 06:55:11,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:55:11,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:55:11,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:55:11,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:55:11,786 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:55:11,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2022-11-19 06:55:11,876 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/data/208e9a165/faf4dd432fae4fd5953f238f68814c85/FLAG9c82d1834 [2022-11-19 06:55:12,416 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:55:12,416 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2022-11-19 06:55:12,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/data/208e9a165/faf4dd432fae4fd5953f238f68814c85/FLAG9c82d1834 [2022-11-19 06:55:12,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/data/208e9a165/faf4dd432fae4fd5953f238f68814c85 [2022-11-19 06:55:12,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:55:12,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:55:12,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:55:12,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:55:12,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:55:12,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:55:12" (1/1) ... [2022-11-19 06:55:12,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ada7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:12, skipping insertion in model container [2022-11-19 06:55:12,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:55:12" (1/1) ... [2022-11-19 06:55:12,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:55:12,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:55:13,032 WARN L234 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_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2022-11-19 06:55:13,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:55:13,055 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:55:13,079 WARN L234 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_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2022-11-19 06:55:13,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:55:13,104 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:55:13,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13 WrapperNode [2022-11-19 06:55:13,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:55:13,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:55:13,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:55:13,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:55:13,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,140 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-11-19 06:55:13,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:55:13,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:55:13,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:55:13,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:55:13,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:55:13,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:55:13,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:55:13,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:55:13,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (1/1) ... [2022-11-19 06:55:13,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:55:13,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:13,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:55:13,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:55:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:55:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:55:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:55:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:55:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:55:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:55:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:55:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:55:13,333 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:55:13,335 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:55:13,555 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:55:13,610 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:55:13,610 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 06:55:13,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:55:13 BoogieIcfgContainer [2022-11-19 06:55:13,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:55:13,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:55:13,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:55:13,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:55:13,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:55:12" (1/3) ... [2022-11-19 06:55:13,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cca67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:55:13, skipping insertion in model container [2022-11-19 06:55:13,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:13" (2/3) ... [2022-11-19 06:55:13,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cca67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:55:13, skipping insertion in model container [2022-11-19 06:55:13,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:55:13" (3/3) ... [2022-11-19 06:55:13,623 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2022-11-19 06:55:13,666 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:55:13,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:55:13,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:55:13,757 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;@76100517, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:55:13,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:55:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:55:13,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:13,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:13,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1646487347, now seen corresponding path program 1 times [2022-11-19 06:55:13,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:13,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221940755] [2022-11-19 06:55:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:13,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:14,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:14,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221940755] [2022-11-19 06:55:14,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221940755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:14,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:14,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:55:14,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343709598] [2022-11-19 06:55:14,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:14,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:14,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:14,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:14,214 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2022-11-19 06:55:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:14,296 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-19 06:55:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2022-11-19 06:55:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:14,308 INFO L225 Difference]: With dead ends: 19 [2022-11-19 06:55:14,308 INFO L226 Difference]: Without dead ends: 10 [2022-11-19 06:55:14,312 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 [2022-11-19 06:55:14,320 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:14,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-19 06:55:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-19 06:55:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2022-11-19 06:55:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-19 06:55:14,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2022-11-19 06:55:14,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:14,362 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-19 06:55:14,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2022-11-19 06:55:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-19 06:55:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:55:14,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:14,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:14,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:55:14,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -566801800, now seen corresponding path program 1 times [2022-11-19 06:55:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248435854] [2022-11-19 06:55:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:14,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:14,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:14,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248435854] [2022-11-19 06:55:14,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248435854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220783182] [2022-11-19 06:55:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:14,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:14,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:14,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:14,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:55:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:14,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:55:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:55:14,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:14,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220783182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:14,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:55:14,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-19 06:55:14,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979572280] [2022-11-19 06:55:14,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:14,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:14,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:14,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:14,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:14,588 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:14,610 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-11-19 06:55:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:14,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:55:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:14,612 INFO L225 Difference]: With dead ends: 18 [2022-11-19 06:55:14,612 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 06:55:14,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:14,614 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:14,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:55:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 06:55:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 06:55:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-19 06:55:14,619 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-19 06:55:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:14,620 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-19 06:55:14,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-19 06:55:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:55:14,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:14,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:14,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:14,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:14,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:14,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1092468414, now seen corresponding path program 1 times [2022-11-19 06:55:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:14,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757844186] [2022-11-19 06:55:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:14,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:55:14,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:14,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757844186] [2022-11-19 06:55:14,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757844186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:14,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569948501] [2022-11-19 06:55:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:14,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:14,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:14,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:14,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:55:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:15,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:55:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:55:15,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:55:15,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569948501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:15,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266918635] [2022-11-19 06:55:15,092 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:55:15,092 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:15,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:15,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:15,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:15,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:15,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:15,251 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:55:15,253 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 [2022-11-19 06:55:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:15,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:15,280 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 [2022-11-19 06:55:15,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:15,336 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 [2022-11-19 06:55:15,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:15,605 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:55:15,606 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 260 treesize of output 259 [2022-11-19 06:55:15,869 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 [2022-11-19 06:55:15,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:15,916 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:15,916 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 33 treesize of output 23 [2022-11-19 06:55:16,029 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:16,030 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 37 treesize of output 27 [2022-11-19 06:55:16,132 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:16,132 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 37 treesize of output 27 [2022-11-19 06:55:16,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 06:55:16,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:16,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:16,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:16,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:16,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:16,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:16,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 06:55:16,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307449588] [2022-11-19 06:55:16,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:16,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:55:16,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:16,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:55:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:55:16,728 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2022-11-19 06:55:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:16,782 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2022-11-19 06:55:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:55:16,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 10 [2022-11-19 06:55:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:16,783 INFO L225 Difference]: With dead ends: 24 [2022-11-19 06:55:16,784 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 06:55:16,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:55:16,785 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:16,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:55:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 06:55:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 06:55:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-19 06:55:16,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2022-11-19 06:55:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:16,791 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-19 06:55:16,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) [2022-11-19 06:55:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-19 06:55:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:55:16,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:16,792 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:16,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:16,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash 428355863, now seen corresponding path program 2 times [2022-11-19 06:55:16,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:16,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458146176] [2022-11-19 06:55:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:17,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:55:17,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458146176] [2022-11-19 06:55:17,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458146176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543361737] [2022-11-19 06:55:17,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:55:17,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:17,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:17,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:55:17,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:55:17,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:55:17,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:55:17,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:55:17,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543361737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:17,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64546203] [2022-11-19 06:55:17,267 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:55:17,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:17,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:17,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:17,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:17,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:17,369 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:55:17,370 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 [2022-11-19 06:55:17,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:17,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:17,391 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 [2022-11-19 06:55:17,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:17,447 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 [2022-11-19 06:55:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:17,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:17,576 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:55:17,577 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 260 treesize of output 259 [2022-11-19 06:55:17,732 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 [2022-11-19 06:55:17,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:17,769 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:17,770 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 33 treesize of output 23 [2022-11-19 06:55:17,823 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:17,824 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 37 treesize of output 27 [2022-11-19 06:55:17,903 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:17,905 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 37 treesize of output 27 [2022-11-19 06:55:17,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 06:55:17,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:18,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:18,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:18,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:18,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:18,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:18,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 06:55:18,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333869772] [2022-11-19 06:55:18,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:18,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:55:18,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:55:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:55:18,378 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:18,430 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-11-19 06:55:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:55:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 13 [2022-11-19 06:55:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:18,431 INFO L225 Difference]: With dead ends: 28 [2022-11-19 06:55:18,431 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 06:55:18,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:55:18,432 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:18,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:55:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 06:55:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 06:55:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-19 06:55:18,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2022-11-19 06:55:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:18,437 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-19 06:55:18,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-19 06:55:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 06:55:18,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:18,438 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:18,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:18,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:18,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:18,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1056972403, now seen corresponding path program 3 times [2022-11-19 06:55:18,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:18,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320366948] [2022-11-19 06:55:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:18,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:55:18,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:18,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320366948] [2022-11-19 06:55:18,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320366948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:18,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133922790] [2022-11-19 06:55:18,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:55:18,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:18,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:18,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:18,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:55:18,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:55:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:18,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:55:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:55:18,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:55:19,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133922790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:19,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1852132096] [2022-11-19 06:55:19,051 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:55:19,052 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:19,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:19,052 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:19,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:19,106 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:55:19,107 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 [2022-11-19 06:55:19,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:19,194 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:55:19,195 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 [2022-11-19 06:55:19,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:19,252 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 [2022-11-19 06:55:19,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:19,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:19,467 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:55:19,468 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 260 treesize of output 259 [2022-11-19 06:55:19,623 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 [2022-11-19 06:55:19,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:19,666 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:19,667 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 33 treesize of output 23 [2022-11-19 06:55:19,721 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:19,721 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 37 treesize of output 27 [2022-11-19 06:55:19,813 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:19,813 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 37 treesize of output 27 [2022-11-19 06:55:19,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:19,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:19,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:19,990 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:20,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:20,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:20,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:20,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 06:55:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159675814] [2022-11-19 06:55:20,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:20,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:55:20,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:55:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:55:20,279 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:20,334 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-11-19 06:55:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:55:20,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 19 [2022-11-19 06:55:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:20,335 INFO L225 Difference]: With dead ends: 42 [2022-11-19 06:55:20,335 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 06:55:20,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:55:20,336 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:20,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:55:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 06:55:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-19 06:55:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-19 06:55:20,344 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2022-11-19 06:55:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:20,344 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-19 06:55:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-19 06:55:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:55:20,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:20,346 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:20,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:20,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:20,546 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1293039187, now seen corresponding path program 4 times [2022-11-19 06:55:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:20,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102934318] [2022-11-19 06:55:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:20,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:55:20,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:20,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102934318] [2022-11-19 06:55:20,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102934318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:20,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062609112] [2022-11-19 06:55:20,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:55:20,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:20,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:20,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:20,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:55:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:21,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:55:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:55:21,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:55:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062609112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760008611] [2022-11-19 06:55:21,345 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:55:21,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:21,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:21,345 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:21,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:21,414 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:55:21,414 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 [2022-11-19 06:55:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:21,432 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 [2022-11-19 06:55:21,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:21,458 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 [2022-11-19 06:55:21,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:21,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:21,570 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:55:21,571 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 260 treesize of output 259 [2022-11-19 06:55:21,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:55:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:21,750 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:21,750 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 33 treesize of output 23 [2022-11-19 06:55:21,801 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:21,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-19 06:55:21,900 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:21,901 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 37 treesize of output 27 [2022-11-19 06:55:21,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 06:55:21,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:22,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:22,022 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:22,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '850#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:22,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:22,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:22,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 06:55:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627533317] [2022-11-19 06:55:22,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:22,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 06:55:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 06:55:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2022-11-19 06:55:22,391 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:22,489 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-11-19 06:55:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 06:55:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-19 06:55:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:22,490 INFO L225 Difference]: With dead ends: 54 [2022-11-19 06:55:22,491 INFO L226 Difference]: Without dead ends: 39 [2022-11-19 06:55:22,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2022-11-19 06:55:22,492 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:22,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-19 06:55:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-19 06:55:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-19 06:55:22,500 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2022-11-19 06:55:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:22,501 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-19 06:55:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-19 06:55:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 06:55:22,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:22,503 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:22,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 06:55:22,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:22,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash 105370093, now seen corresponding path program 5 times [2022-11-19 06:55:22,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:22,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317021903] [2022-11-19 06:55:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:22,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:55:23,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317021903] [2022-11-19 06:55:23,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317021903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:23,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081490288] [2022-11-19 06:55:23,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:55:23,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:23,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:23,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:23,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:55:23,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:55:23,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:23,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:55:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-19 06:55:23,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-19 06:55:24,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081490288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:24,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167919328] [2022-11-19 06:55:24,041 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:55:24,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:24,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:24,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:24,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:24,098 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:55:24,098 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 [2022-11-19 06:55:24,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:24,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:24,163 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:55:24,163 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 [2022-11-19 06:55:24,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:24,198 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 [2022-11-19 06:55:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:24,315 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:55:24,315 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 270 treesize of output 258 [2022-11-19 06:55:24,411 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 [2022-11-19 06:55:24,450 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:55:24,451 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 23 treesize of output 18 [2022-11-19 06:55:24,507 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:24,508 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 37 treesize of output 27 [2022-11-19 06:55:24,576 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:24,577 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 37 treesize of output 27 [2022-11-19 06:55:24,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:24,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:24,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:24,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:25,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1279#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:25,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:25,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:25,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 34 [2022-11-19 06:55:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237993668] [2022-11-19 06:55:25,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:25,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 06:55:25,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:25,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 06:55:25,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 06:55:25,182 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:25,803 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-11-19 06:55:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 06:55:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 06:55:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:25,805 INFO L225 Difference]: With dead ends: 67 [2022-11-19 06:55:25,805 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 06:55:25,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1199, Invalid=2833, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 06:55:25,808 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 150 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:25,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 40 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 06:55:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-19 06:55:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-19 06:55:25,817 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 37 [2022-11-19 06:55:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:25,817 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-19 06:55:25,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-19 06:55:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 06:55:25,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:25,819 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:25,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 06:55:26,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:26,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash 103536344, now seen corresponding path program 6 times [2022-11-19 06:55:26,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:26,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526518854] [2022-11-19 06:55:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 06:55:26,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526518854] [2022-11-19 06:55:26,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526518854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380382123] [2022-11-19 06:55:26,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:55:26,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:26,969 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:26,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:55:27,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:55:27,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 06:55:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 06:55:27,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 06:55:28,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380382123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:28,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630753322] [2022-11-19 06:55:28,090 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:55:28,090 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:28,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:28,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:28,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:28,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:28,146 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:55:28,147 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 [2022-11-19 06:55:28,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:28,165 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 [2022-11-19 06:55:28,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:28,195 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 [2022-11-19 06:55:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:28,290 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:55:28,291 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 270 treesize of output 258 [2022-11-19 06:55:28,371 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 [2022-11-19 06:55:28,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:28,420 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:55:28,420 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 33 treesize of output 23 [2022-11-19 06:55:28,470 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:28,470 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 37 treesize of output 27 [2022-11-19 06:55:28,533 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:28,533 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 37 treesize of output 27 [2022-11-19 06:55:28,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 06:55:28,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:28,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:28,643 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:29,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1900#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:29,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:29,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:29,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-19 06:55:29,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219974877] [2022-11-19 06:55:29,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:29,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 06:55:29,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 06:55:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1294, Invalid=1898, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:55:29,075 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:29,212 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2022-11-19 06:55:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 06:55:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-19 06:55:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:29,217 INFO L225 Difference]: With dead ends: 104 [2022-11-19 06:55:29,217 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 06:55:29,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1294, Invalid=1898, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:55:29,220 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:29,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 06:55:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-19 06:55:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-11-19 06:55:29,251 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 50 [2022-11-19 06:55:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:29,251 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-11-19 06:55:29,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-11-19 06:55:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 06:55:29,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:29,258 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:29,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:29,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 06:55:29,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:29,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:29,466 INFO L85 PathProgramCache]: Analyzing trace with hash 365754573, now seen corresponding path program 7 times [2022-11-19 06:55:29,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:29,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595724607] [2022-11-19 06:55:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:29,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 06:55:31,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595724607] [2022-11-19 06:55:31,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595724607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48825619] [2022-11-19 06:55:31,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:55:31,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:31,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:31,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:55:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:32,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 06:55:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 06:55:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 06:55:35,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48825619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:35,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331439069] [2022-11-19 06:55:35,632 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:55:35,632 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:35,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:35,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:35,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:35,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:35,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:35,684 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:55:35,684 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 [2022-11-19 06:55:35,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:35,741 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:55:35,742 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 [2022-11-19 06:55:35,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:35,769 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 [2022-11-19 06:55:35,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:35,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:35,869 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:55:35,870 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 260 treesize of output 259 [2022-11-19 06:55:36,033 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 [2022-11-19 06:55:36,066 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:55:36,067 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 23 treesize of output 18 [2022-11-19 06:55:36,123 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:36,123 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 37 treesize of output 27 [2022-11-19 06:55:36,201 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:36,201 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 37 treesize of output 27 [2022-11-19 06:55:36,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:36,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:36,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:36,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:36,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2799#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:36,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:36,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:36,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-19 06:55:36,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044641196] [2022-11-19 06:55:36,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:36,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-19 06:55:36,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-19 06:55:36,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=6273, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 06:55:36,825 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:37,053 INFO L93 Difference]: Finished difference Result 154 states and 209 transitions. [2022-11-19 06:55:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-19 06:55:37,054 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-19 06:55:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:37,057 INFO L225 Difference]: With dead ends: 154 [2022-11-19 06:55:37,057 INFO L226 Difference]: Without dead ends: 127 [2022-11-19 06:55:37,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5069, Invalid=6273, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 06:55:37,064 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:37,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-19 06:55:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-19 06:55:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-11-19 06:55:37,090 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2022-11-19 06:55:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:37,091 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-11-19 06:55:37,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-11-19 06:55:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 06:55:37,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:37,101 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:37,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:37,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:37,309 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1906712787, now seen corresponding path program 8 times [2022-11-19 06:55:37,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:37,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891081058] [2022-11-19 06:55:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:37,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 06:55:45,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:45,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891081058] [2022-11-19 06:55:45,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891081058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:45,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731167119] [2022-11-19 06:55:45,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:55:45,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:45,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:45,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:45,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:55:45,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 06:55:45,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:45,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:55:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2022-11-19 06:55:46,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2022-11-19 06:55:47,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731167119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:47,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132160089] [2022-11-19 06:55:47,021 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:55:47,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:47,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:47,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:47,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:47,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:47,071 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:55:47,071 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 [2022-11-19 06:55:47,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:47,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:47,122 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:55:47,124 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 [2022-11-19 06:55:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:47,153 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 [2022-11-19 06:55:47,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:47,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:55:47,246 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:55:47,247 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 260 treesize of output 259 [2022-11-19 06:55:47,352 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 [2022-11-19 06:55:47,377 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:55:47,378 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 23 treesize of output 18 [2022-11-19 06:55:47,418 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:47,418 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 37 treesize of output 27 [2022-11-19 06:55:47,481 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:55:47,482 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 37 treesize of output 27 [2022-11-19 06:55:47,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 06:55:47,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:47,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:55:47,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:48,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4220#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:48,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:48,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:48,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-19 06:55:48,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537916349] [2022-11-19 06:55:48,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:48,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-19 06:55:48,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-19 06:55:48,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5366, Invalid=11146, Unknown=0, NotChecked=0, Total=16512 [2022-11-19 06:55:48,293 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 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) [2022-11-19 06:55:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:53,544 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2022-11-19 06:55:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-19 06:55:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 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 125 [2022-11-19 06:55:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:53,546 INFO L225 Difference]: With dead ends: 179 [2022-11-19 06:55:53,546 INFO L226 Difference]: Without dead ends: 152 [2022-11-19 06:55:53,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7996 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=17543, Invalid=34213, Unknown=0, NotChecked=0, Total=51756 [2022-11-19 06:55:53,553 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 404 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:53,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 40 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:55:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-19 06:55:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-19 06:55:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-11-19 06:55:53,567 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 125 [2022-11-19 06:55:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:53,567 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-11-19 06:55:53,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 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) [2022-11-19 06:55:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-11-19 06:55:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-19 06:55:53,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:53,569 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:53,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 06:55:53,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:55:53,775 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -818185320, now seen corresponding path program 9 times [2022-11-19 06:55:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:53,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690262266] [2022-11-19 06:55:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 06:56:01,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:56:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690262266] [2022-11-19 06:56:01,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690262266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108545217] [2022-11-19 06:56:01,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:56:01,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:01,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:01,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:01,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:56:01,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:56:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:56:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-19 06:56:01,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 06:56:02,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 06:56:14,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108545217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392723690] [2022-11-19 06:56:14,769 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:56:14,769 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:56:14,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:56:14,770 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:56:14,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:56:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:14,819 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:56:14,820 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 [2022-11-19 06:56:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:14,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:14,836 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 [2022-11-19 06:56:14,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:14,858 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 [2022-11-19 06:56:14,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:14,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:14,955 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:56:14,955 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 260 treesize of output 259 [2022-11-19 06:56:15,081 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 [2022-11-19 06:56:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:56:15,108 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:56:15,109 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 33 treesize of output 23 [2022-11-19 06:56:15,154 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:56:15,155 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 37 treesize of output 27 [2022-11-19 06:56:15,215 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:56:15,216 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 37 treesize of output 27 [2022-11-19 06:56:15,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 06:56:15,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:56:15,327 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:56:16,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6169#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:56:16,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:56:16,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:56:16,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-19 06:56:16,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822964462] [2022-11-19 06:56:16,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:56:16,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-19 06:56:16,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:56:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-19 06:56:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20522, Invalid=22950, Unknown=0, NotChecked=0, Total=43472 [2022-11-19 06:56:16,178 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:16,810 INFO L93 Difference]: Finished difference Result 304 states and 410 transitions. [2022-11-19 06:56:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-19 06:56:16,810 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 0 states have call successors, (0), 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 150 [2022-11-19 06:56:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:16,812 INFO L225 Difference]: With dead ends: 304 [2022-11-19 06:56:16,812 INFO L226 Difference]: Without dead ends: 253 [2022-11-19 06:56:16,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=20522, Invalid=22950, Unknown=0, NotChecked=0, Total=43472 [2022-11-19 06:56:16,815 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:16,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:56:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-19 06:56:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-11-19 06:56:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 252 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 256 transitions. [2022-11-19 06:56:16,837 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 256 transitions. Word has length 150 [2022-11-19 06:56:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:16,838 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 256 transitions. [2022-11-19 06:56:16,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 256 transitions. [2022-11-19 06:56:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-19 06:56:16,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:16,841 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:16,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:17,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:17,067 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:17,068 INFO L85 PathProgramCache]: Analyzing trace with hash 415490893, now seen corresponding path program 10 times [2022-11-19 06:56:17,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:56:17,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454920252] [2022-11-19 06:56:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:56:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 06:56:43,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:56:43,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454920252] [2022-11-19 06:56:43,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454920252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:43,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914925522] [2022-11-19 06:56:43,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:56:43,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:43,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:43,509 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:43,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:56:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:44,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 2156 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-19 06:56:44,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 06:56:44,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 06:57:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914925522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833789780] [2022-11-19 06:57:34,834 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:57:34,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:34,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:34,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:34,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,899 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:57:34,900 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 [2022-11-19 06:57:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,929 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 [2022-11-19 06:57:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,958 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 [2022-11-19 06:57:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:35,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:35,058 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:57:35,059 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 260 treesize of output 259 [2022-11-19 06:57:35,176 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 [2022-11-19 06:57:35,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:35,203 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:57:35,204 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 33 treesize of output 23 [2022-11-19 06:57:35,248 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:57:35,249 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 37 treesize of output 27 [2022-11-19 06:57:35,314 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:57:35,315 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 37 treesize of output 27 [2022-11-19 06:57:35,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 06:57:35,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:57:35,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:57:35,431 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:36,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9180#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 06:57:36,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:57:36,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:36,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-19 06:57:36,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121720751] [2022-11-19 06:57:36,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:36,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-19 06:57:36,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-19 06:57:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81829, Invalid=86681, Unknown=0, NotChecked=0, Total=168510 [2022-11-19 06:57:36,564 INFO L87 Difference]: Start difference. First operand 253 states and 256 transitions. Second operand has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:40,007 INFO L93 Difference]: Finished difference Result 506 states and 713 transitions. [2022-11-19 06:57:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-19 06:57:40,009 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 0 states have call successors, (0), 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 251 [2022-11-19 06:57:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:40,012 INFO L225 Difference]: With dead ends: 506 [2022-11-19 06:57:40,013 INFO L226 Difference]: Without dead ends: 455 [2022-11-19 06:57:40,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4420 ImplicationChecksByTransitivity, 66.9s TimeCoverageRelationStatistics Valid=81829, Invalid=86681, Unknown=0, NotChecked=0, Total=168510 [2022-11-19 06:57:40,023 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:40,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:57:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-19 06:57:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2022-11-19 06:57:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.0088105726872247) internal successors, (458), 454 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 458 transitions. [2022-11-19 06:57:40,058 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 458 transitions. Word has length 251 [2022-11-19 06:57:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:40,059 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 458 transitions. [2022-11-19 06:57:40,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 458 transitions. [2022-11-19 06:57:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-11-19 06:57:40,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:40,071 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:40,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:40,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 06:57:40,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:40,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1013231059, now seen corresponding path program 11 times [2022-11-19 06:57:40,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:40,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443264791] [2022-11-19 06:57:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:40,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-19 06:59:33,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443264791] [2022-11-19 06:59:33,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443264791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324107487] [2022-11-19 06:59:33,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:59:33,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:33,500 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:33,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:59:50,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-19 06:59:50,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 06:59:50,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81256 trivial. 0 not checked. [2022-11-19 06:59:54,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81256 trivial. 0 not checked. [2022-11-19 06:59:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324107487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:58,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423867634] [2022-11-19 06:59:58,703 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 06:59:58,703 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:58,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:58,704 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:58,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:58,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,747 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:59:58,747 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 [2022-11-19 06:59:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,806 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:59:58,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:59:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,834 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 [2022-11-19 06:59:58,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:58,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:58,916 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:59:58,917 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 260 treesize of output 259 [2022-11-19 06:59:59,028 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 [2022-11-19 06:59:59,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:59,056 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 06:59:59,057 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 33 treesize of output 23 [2022-11-19 06:59:59,098 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:59:59,098 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 37 treesize of output 27 [2022-11-19 06:59:59,155 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:59:59,155 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 37 treesize of output 27 [2022-11-19 06:59:59,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:59:59,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:59:59,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 06:59:59,254 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:00:01,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14257#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-19 07:00:01,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:00:01,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:00:01,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 25, 25] total 451 [2022-11-19 07:00:01,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942500738] [2022-11-19 07:00:01,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:01,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2022-11-19 07:00:01,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2022-11-19 07:00:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83002, Invalid=125390, Unknown=0, NotChecked=0, Total=208392 [2022-11-19 07:00:01,458 INFO L87 Difference]: Start difference. First operand 455 states and 458 transitions. Second operand has 451 states, 451 states have (on average 1.0266075388026608) internal successors, (463), 451 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:25,080 INFO L93 Difference]: Finished difference Result 555 states and 609 transitions. [2022-11-19 07:01:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-19 07:01:25,081 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.0266075388026608) internal successors, (463), 451 states have internal predecessors, (463), 0 states have call successors, (0), 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 453 [2022-11-19 07:01:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:25,083 INFO L225 Difference]: With dead ends: 555 [2022-11-19 07:01:25,083 INFO L226 Difference]: Without dead ends: 504 [2022-11-19 07:01:25,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2164 GetRequests, 1306 SyntacticMatches, 0 SemanticMatches, 858 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103144 ImplicationChecksByTransitivity, 150.4s TimeCoverageRelationStatistics Valid=264755, Invalid=473985, Unknown=0, NotChecked=0, Total=738740 [2022-11-19 07:01:25,120 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1215 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:25,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1215 Valid, 48 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:01:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-19 07:01:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-11-19 07:01:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.0079522862823063) internal successors, (507), 503 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 507 transitions. [2022-11-19 07:01:25,154 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 507 transitions. Word has length 453 [2022-11-19 07:01:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:25,155 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 507 transitions. [2022-11-19 07:01:25,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.0266075388026608) internal successors, (463), 451 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 507 transitions. [2022-11-19 07:01:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-19 07:01:25,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:25,167 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:25,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:25,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:01:25,380 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:01:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash 11562136, now seen corresponding path program 12 times [2022-11-19 07:01:25,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:25,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345242544] [2022-11-19 07:01:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:25,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-19 07:03:13,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:13,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345242544] [2022-11-19 07:03:13,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345242544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:13,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890840423] [2022-11-19 07:03:13,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:03:13,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:13,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:13,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:03:14,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:03:14,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:14,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 4295 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-19 07:03:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-19 07:03:15,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-19 07:06:31,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890840423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:06:31,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55493327] [2022-11-19 07:06:31,005 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:06:31,005 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:06:31,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:06:31,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:06:31,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:06:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:31,051 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:06:31,052 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 [2022-11-19 07:06:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:31,096 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:06:31,096 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 [2022-11-19 07:06:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:31,116 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 [2022-11-19 07:06:31,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:06:31,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:06:31,203 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:06:31,203 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 260 treesize of output 259 [2022-11-19 07:06:31,305 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 [2022-11-19 07:06:31,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:06:31,329 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:06:31,330 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 33 treesize of output 23 [2022-11-19 07:06:31,371 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:06:31,372 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 37 treesize of output 27 [2022-11-19 07:06:31,432 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 07:06:31,434 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 37 treesize of output 27 [2022-11-19 07:06:31,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 07:06:31,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-19 07:06:31,652 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:06:34,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20990#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 0 |#NULL.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#bb~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#aa~0#1.offset|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (<= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)))' at error location [2022-11-19 07:06:34,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:06:34,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:06:34,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-19 07:06:34,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273743384] [2022-11-19 07:06:34,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:06:34,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-19 07:06:34,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-19 07:06:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328474, Invalid=338198, Unknown=0, NotChecked=0, Total=666672 [2022-11-19 07:06:34,341 INFO L87 Difference]: Start difference. First operand 504 states and 507 transitions. Second operand has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:54,614 INFO L93 Difference]: Finished difference Result 1008 states and 1418 transitions. [2022-11-19 07:06:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-19 07:06:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 0 states have call successors, (0), 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 502 [2022-11-19 07:06:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:54,619 INFO L225 Difference]: With dead ends: 1008 [2022-11-19 07:06:54,619 INFO L226 Difference]: Without dead ends: 909 [2022-11-19 07:06:54,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1094 SyntacticMatches, 0 SemanticMatches, 815 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8886 ImplicationChecksByTransitivity, 261.2s TimeCoverageRelationStatistics Valid=328474, Invalid=338198, Unknown=0, NotChecked=0, Total=666672 [2022-11-19 07:06:54,662 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:54,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:06:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-19 07:06:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 909. [2022-11-19 07:06:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 1.0044052863436124) internal successors, (912), 908 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 912 transitions. [2022-11-19 07:06:54,710 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 912 transitions. Word has length 502 [2022-11-19 07:06:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:54,711 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 912 transitions. [2022-11-19 07:06:54,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:06:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 912 transitions. [2022-11-19 07:06:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-11-19 07:06:54,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:54,720 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:54,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:54,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab1c0ef-b11d-4561-a3fb-185d8fdb5bae/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:54,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1630685517, now seen corresponding path program 13 times [2022-11-19 07:06:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:54,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245397468] [2022-11-19 07:06:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:54,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat