./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c --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_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/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_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/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_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/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 e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae --- 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 08:11:58,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:11:58,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:11:58,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:11:58,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:11:58,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:11:58,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:11:58,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:11:58,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:11:58,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:11:58,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:11:58,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:11:58,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:11:58,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:11:58,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:11:58,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:11:58,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:11:58,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:11:58,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:11:58,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:11:58,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:11:58,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:11:58,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:11:58,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:11:58,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:11:58,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:11:58,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:11:58,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:11:58,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:11:58,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:11:58,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:11:58,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:11:58,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:11:58,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:11:58,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:11:58,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:11:58,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:11:58,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:11:58,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:11:58,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:11:58,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:11:58,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:11:58,517 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:11:58,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:11:58,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:11:58,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:11:58,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:11:58,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:11:58,526 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:11:58,528 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:11:58,528 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:11:58,528 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:11:58,530 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:11:58,530 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:11:58,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:11:58,531 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:11:58,531 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:11:58,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:11:58,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:11:58,532 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:11:58,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:11:58,533 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:11:58,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:11:58,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:11:58,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:11:58,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:11:58,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:11:58,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:11:58,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:11:58,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:11:58,538 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:11:58,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:11:58,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:11:58,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:11:58,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:11:58,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:11:58,540 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:11:58,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:11:58,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:11:58,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:11:58,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:11:58,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:11:58,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:11:58,541 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_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae [2022-11-19 08:11:58,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:11:58,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:11:58,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:11:58,922 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:11:58,923 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:11:58,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2022-11-19 08:11:59,022 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/data/a648c24b1/8dff1404a75d47e6ac94f34565c0562d/FLAGd9c2fdab1 [2022-11-19 08:11:59,630 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:11:59,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2022-11-19 08:11:59,639 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/data/a648c24b1/8dff1404a75d47e6ac94f34565c0562d/FLAGd9c2fdab1 [2022-11-19 08:11:59,937 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/data/a648c24b1/8dff1404a75d47e6ac94f34565c0562d [2022-11-19 08:11:59,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:11:59,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:11:59,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:11:59,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:11:59,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:11:59,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:11:59" (1/1) ... [2022-11-19 08:11:59,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c736855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:59, skipping insertion in model container [2022-11-19 08:11:59,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:11:59" (1/1) ... [2022-11-19 08:11:59,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:11:59,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:12:00,284 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_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2022-11-19 08:12:00,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:00,345 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:12:00,371 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_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2022-11-19 08:12:00,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:00,419 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:12:00,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00 WrapperNode [2022-11-19 08:12:00,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:00,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:00,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:12:00,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:12:00,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,492 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-11-19 08:12:00,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:00,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:12:00,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:12:00,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:12:00,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,558 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:12:00,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:12:00,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:12:00,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:12:00,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (1/1) ... [2022-11-19 08:12:00,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:00,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:00,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:12:00,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:12:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:12:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:12:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:12:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:12:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:12:00,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:12:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:12:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:12:00,787 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:12:00,790 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:12:01,016 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:12:01,134 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:12:01,134 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:12:01,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:01 BoogieIcfgContainer [2022-11-19 08:12:01,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:12:01,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:12:01,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:12:01,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:12:01,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:11:59" (1/3) ... [2022-11-19 08:12:01,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a89683d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:01, skipping insertion in model container [2022-11-19 08:12:01,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:00" (2/3) ... [2022-11-19 08:12:01,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a89683d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:01, skipping insertion in model container [2022-11-19 08:12:01,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:01" (3/3) ... [2022-11-19 08:12:01,155 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2022-11-19 08:12:01,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:12:01,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:12:01,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:12:01,308 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;@6b4f5272, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:12:01,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:12:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:01,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:12:01,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:01,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:12:01,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:01,347 INFO L85 PathProgramCache]: Analyzing trace with hash 113225757, now seen corresponding path program 1 times [2022-11-19 08:12:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:01,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269493998] [2022-11-19 08:12:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:01,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:01,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202075623] [2022-11-19 08:12:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:01,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:01,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:01,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:01,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:12:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:12:01,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:01,871 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 08:12:01,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:12:01,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269493998] [2022-11-19 08:12:01,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:01,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202075623] [2022-11-19 08:12:01,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202075623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:01,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:01,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:12:01,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88021094] [2022-11-19 08:12:01,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:01,939 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 08:12:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:02,037 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-11-19 08:12:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:02,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-19 08:12:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:02,051 INFO L225 Difference]: With dead ends: 15 [2022-11-19 08:12:02,053 INFO L226 Difference]: Without dead ends: 8 [2022-11-19 08:12:02,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:12:02,065 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:02,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-19 08:12:02,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-19 08:12:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-19 08:12:02,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-19 08:12:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:02,116 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-19 08:12:02,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 08:12:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-19 08:12:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:12:02,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:02,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:12:02,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:12:02,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:12:02,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:02,327 INFO L85 PathProgramCache]: Analyzing trace with hash -777643133, now seen corresponding path program 1 times [2022-11-19 08:12:02,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:02,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752443610] [2022-11-19 08:12:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:02,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:02,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553409117] [2022-11-19 08:12:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:02,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:02,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:12:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:02,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:12:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:02,494 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 08:12:02,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:02,525 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 08:12:02,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:02,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752443610] [2022-11-19 08:12:02,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553409117] [2022-11-19 08:12:02,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553409117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [45837275] [2022-11-19 08:12:02,552 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 08:12:02,552 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:02,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:02,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:02,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:02,776 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:02,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:02,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:02,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:12:02,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:02,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:02,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-11-19 08:12:03,046 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:03,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:12:03,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:12:03,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:03,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:12:03,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:03,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:03,611 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:03,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:12:03,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:03,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:03,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-19 08:12:03,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:03,928 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:03,977 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:04,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [45837275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:04,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:04,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2022-11-19 08:12:04,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281987517] [2022-11-19 08:12:04,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:04,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:12:04,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:12:04,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:12:04,331 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:04,421 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-19 08:12:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:12:04,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:12:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:04,423 INFO L225 Difference]: With dead ends: 13 [2022-11-19 08:12:04,423 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 08:12:04,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:12:04,426 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:04,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:04,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 08:12:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-19 08:12:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-19 08:12:04,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-19 08:12:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:04,445 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-19 08:12:04,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-19 08:12:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:12:04,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:04,447 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:04,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:04,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash 292223012, now seen corresponding path program 1 times [2022-11-19 08:12:04,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:04,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033449788] [2022-11-19 08:12:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:04,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:04,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:04,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536878467] [2022-11-19 08:12:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:04,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:04,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:04,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:04,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:12:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:04,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:12:04,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:04,801 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 08:12:04,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:04,824 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 08:12:04,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:04,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033449788] [2022-11-19 08:12:04,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:04,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536878467] [2022-11-19 08:12:04,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536878467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:04,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707146589] [2022-11-19 08:12:04,842 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:12:04,843 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:04,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:04,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:04,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:04,917 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:12:04,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:12:04,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:04,990 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:04,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:05,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:05,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:05,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 168 [2022-11-19 08:12:05,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:05,139 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 87 treesize of output 76 [2022-11-19 08:12:05,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:05,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:05,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:12:05,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:05,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:05,461 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:05,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-19 08:12:05,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:05,739 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:06,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:06,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:06,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-19 08:12:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970423972] [2022-11-19 08:12:06,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:12:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:12:06,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:12:06,752 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:06,809 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-19 08:12:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:12:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:12:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:06,811 INFO L225 Difference]: With dead ends: 20 [2022-11-19 08:12:06,811 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 08:12:06,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:12:06,813 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:06,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:12:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 08:12:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 08:12:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 08:12:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-19 08:12:06,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-11-19 08:12:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:06,822 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-19 08:12:06,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-19 08:12:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:12:06,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:06,824 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:06,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:07,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:07,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:07,031 INFO L85 PathProgramCache]: Analyzing trace with hash 286903242, now seen corresponding path program 2 times [2022-11-19 08:12:07,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:07,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753129391] [2022-11-19 08:12:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:07,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:07,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:07,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791752514] [2022-11-19 08:12:07,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:07,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:07,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:07,055 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:07,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:12:07,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:12:07,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:07,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:12:07,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:07,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:12:07,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 74 [2022-11-19 08:12:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:12:07,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:08,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:12:08,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 124 [2022-11-19 08:12:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:12:08,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753129391] [2022-11-19 08:12:08,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791752514] [2022-11-19 08:12:08,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791752514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1879697418] [2022-11-19 08:12:08,871 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:12:08,871 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:08,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:08,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:08,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,941 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:08,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:08,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:12:09,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:09,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:09,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-11-19 08:12:09,060 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:09,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:12:09,248 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:09,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:12:09,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:09,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:09,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:09,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:09,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:12:09,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:12:09,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:09,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:12:09,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:09,611 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:09,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:09,811 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:10,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '310#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:10,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:10,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:10,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-19 08:12:10,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892577620] [2022-11-19 08:12:10,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:10,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:12:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:12:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:12:10,663 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:10,918 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-19 08:12:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:12:10,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:12:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:10,921 INFO L225 Difference]: With dead ends: 21 [2022-11-19 08:12:10,921 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 08:12:10,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:12:10,923 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:10,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-11-19 08:12:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 08:12:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 08:12:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-19 08:12:10,943 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2022-11-19 08:12:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:10,944 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-19 08:12:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-19 08:12:10,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:12:10,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:10,947 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 08:12:10,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:11,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:11,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:11,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2126779670, now seen corresponding path program 3 times [2022-11-19 08:12:11,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:11,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646967351] [2022-11-19 08:12:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:11,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:11,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:11,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263422113] [2022-11-19 08:12:11,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:11,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:11,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:11,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:11,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:12:11,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:11,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:11,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:12:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:12:11,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:12:11,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:11,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646967351] [2022-11-19 08:12:11,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:11,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263422113] [2022-11-19 08:12:11,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263422113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603351771] [2022-11-19 08:12:11,464 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:12:11,464 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:11,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:11,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:11,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:11,526 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:12:11,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:12:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:11,587 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:11,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:11,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:11,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 168 [2022-11-19 08:12:11,692 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:11,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:11,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:12:11,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:12:11,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:11,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:12:11,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:11,906 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:11,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:12,128 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:12,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '489#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:12,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:12,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:12,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-19 08:12:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007515687] [2022-11-19 08:12:12,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:12,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:12:12,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:12,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:12:12,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:12:12,988 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:13,068 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-19 08:12:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:12:13,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:12:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:13,075 INFO L225 Difference]: With dead ends: 38 [2022-11-19 08:12:13,075 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 08:12:13,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:12:13,076 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:13,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 08:12:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 08:12:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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 08:12:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-19 08:12:13,090 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2022-11-19 08:12:13,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:13,090 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-19 08:12:13,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-19 08:12:13,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:12:13,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:13,092 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 08:12:13,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:12:13,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:13,299 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash -953525078, now seen corresponding path program 4 times [2022-11-19 08:12:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:13,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688192116] [2022-11-19 08:12:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:13,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:13,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449896807] [2022-11-19 08:12:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:13,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:13,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:13,328 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:13,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:12:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:13,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:12:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:12:13,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:12:14,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688192116] [2022-11-19 08:12:14,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449896807] [2022-11-19 08:12:14,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449896807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966662252] [2022-11-19 08:12:14,029 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:12:14,029 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:14,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:14,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:14,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:14,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,094 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:14,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:14,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:12:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 168 [2022-11-19 08:12:14,202 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:12:14,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:14,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:12:14,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-19 08:12:14,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:12:14,423 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:14,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:15,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:15,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:15,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:15,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-19 08:12:15,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329012745] [2022-11-19 08:12:15,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:15,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:12:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:15,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:12:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:12:15,504 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 08:12:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:15,631 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-11-19 08:12:15,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:12:15,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 24 [2022-11-19 08:12:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:15,634 INFO L225 Difference]: With dead ends: 50 [2022-11-19 08:12:15,634 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 08:12:15,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:12:15,636 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:15,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 08:12:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-19 08:12:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-19 08:12:15,669 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2022-11-19 08:12:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:15,670 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-19 08:12:15,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 08:12:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-19 08:12:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:12:15,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:15,672 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 08:12:15,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:15,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:12:15,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash 947802154, now seen corresponding path program 5 times [2022-11-19 08:12:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406537902] [2022-11-19 08:12:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:15,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:15,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:15,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515172529] [2022-11-19 08:12:15,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:15,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:15,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:15,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:12:16,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:12:16,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:16,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:12:16,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:17,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:12:17,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 175 [2022-11-19 08:12:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-19 08:12:18,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:22,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:12:22,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 219 treesize of output 223 [2022-11-19 08:13:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 08:13:28,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:28,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406537902] [2022-11-19 08:13:28,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:13:28,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515172529] [2022-11-19 08:13:28,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515172529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1459333509] [2022-11-19 08:13:28,703 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:13:28,704 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:28,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:28,704 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:28,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:28,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:28,779 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:28,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:28,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:13:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:28,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-11-19 08:13:28,909 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:28,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:28,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:13:29,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:13:29,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:13:29,156 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:29,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:13:29,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:29,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:29,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:13:29,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:13:29,355 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:29,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:13:29,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:29,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:13:29,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:29,585 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:30,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1129#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:30,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:30,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:13:30,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2022-11-19 08:13:30,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670222416] [2022-11-19 08:13:30,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:30,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:13:30,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:13:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:13:30,547 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:41,279 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-11-19 08:13:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 08:13:41,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-19 08:13:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:41,281 INFO L225 Difference]: With dead ends: 51 [2022-11-19 08:13:41,281 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 08:13:41,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:13:41,283 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:41,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-19 08:13:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 08:13:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-19 08:13:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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 08:13:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-19 08:13:41,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2022-11-19 08:13:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:41,302 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-19 08:13:41,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-19 08:13:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 08:13:41,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:41,304 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 7, 7, 1, 1, 1, 1] [2022-11-19 08:13:41,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 08:13:41,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:13:41,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:41,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2142447210, now seen corresponding path program 6 times [2022-11-19 08:13:41,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:41,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489330196] [2022-11-19 08:13:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:41,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:13:41,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489651692] [2022-11-19 08:13:41,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:13:41,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:41,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:41,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:41,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:13:41,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:13:41,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:41,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:13:41,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:13:42,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:13:43,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:43,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489330196] [2022-11-19 08:13:43,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:13:43,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489651692] [2022-11-19 08:13:43,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489651692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:43,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576260620] [2022-11-19 08:13:43,418 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:13:43,419 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:43,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:43,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:43,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:43,471 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:13:43,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:13:43,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:43,522 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:43,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:43,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:43,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-11-19 08:13:43,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:43,596 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 59 treesize of output 50 [2022-11-19 08:13:43,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-19 08:13:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:43,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:13:43,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:43,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:43,840 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:43,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-19 08:13:43,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:13:44,095 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:45,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1640#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (+ 2 (div (mod ~N~0 4294967296) (* 2 (mod |ULTIMATE.start_main_~R~0#1| 2147483648)))) 4294967296)) 1 0)) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:45,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:45,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:13:45,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-19 08:13:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797725048] [2022-11-19 08:13:45,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-19 08:13:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-19 08:13:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=1609, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:13:45,483 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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 08:13:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:46,128 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2022-11-19 08:13:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 08:13:46,128 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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 48 [2022-11-19 08:13:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:46,130 INFO L225 Difference]: With dead ends: 98 [2022-11-19 08:13:46,130 INFO L226 Difference]: Without dead ends: 73 [2022-11-19 08:13:46,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1147, Invalid=1609, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:13:46,133 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:46,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:13:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-19 08:13:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-19 08:13:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 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 08:13:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-19 08:13:46,173 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 48 [2022-11-19 08:13:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:46,173 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-19 08:13:46,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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 08:13:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-19 08:13:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 08:13:46,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:46,176 INFO L195 NwaCegarLoop]: trace histogram [46, 8, 7, 7, 1, 1, 1, 1] [2022-11-19 08:13:46,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:46,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 08:13:46,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2126826858, now seen corresponding path program 7 times [2022-11-19 08:13:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:46,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143043475] [2022-11-19 08:13:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:46,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:13:46,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350119014] [2022-11-19 08:13:46,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:13:46,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:46,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:46,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:13:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:46,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 08:13:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:13:48,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:13:53,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:53,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143043475] [2022-11-19 08:13:53,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:13:53,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350119014] [2022-11-19 08:13:53,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350119014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:53,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69263959] [2022-11-19 08:13:53,081 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:13:53,082 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:53,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:53,082 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:53,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:53,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:53,140 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:13:53,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:13:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:53,195 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:53,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:53,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:53,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:53,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 168 [2022-11-19 08:13:53,291 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:53,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:53,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:13:53,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:53,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:53,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-19 08:13:53,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:13:53,602 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:53,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:53,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-11-19 08:13:53,712 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:53,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-11-19 08:13:53,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:13:53,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:53,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-19 08:13:53,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-19 08:13:54,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:55,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2456#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (+ 2 (div (mod ~N~0 4294967296) (* 2 (mod |ULTIMATE.start_main_~R~0#1| 2147483648)))) 4294967296)) 1 0)) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_main_~R~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:55,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:55,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:13:55,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2022-11-19 08:13:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949933862] [2022-11-19 08:13:55,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-19 08:13:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:55,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-19 08:13:55,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=5521, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 08:13:55,443 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 08:13:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:56,292 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2022-11-19 08:13:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-19 08:13:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 72 [2022-11-19 08:13:56,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:56,298 INFO L225 Difference]: With dead ends: 146 [2022-11-19 08:13:56,301 INFO L226 Difference]: Without dead ends: 121 [2022-11-19 08:13:56,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4579, Invalid=5521, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 08:13:56,306 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:56,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:13:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-19 08:13:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-19 08:13:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 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 08:13:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-11-19 08:13:56,369 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 72 [2022-11-19 08:13:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:56,370 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-11-19 08:13:56,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 08:13:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-11-19 08:13:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 08:13:56,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:56,382 INFO L195 NwaCegarLoop]: trace histogram [94, 8, 7, 7, 1, 1, 1, 1] [2022-11-19 08:13:56,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 08:13:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:56,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash 429464426, now seen corresponding path program 8 times [2022-11-19 08:13:56,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052290666] [2022-11-19 08:13:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:56,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:56,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:13:56,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728942865] [2022-11-19 08:13:56,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:56,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:56,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:56,689 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:56,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f391bc4f-9c67-4597-8e0c-ad6ac316b9e0/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:14:05,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 08:14:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:05,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:14:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:09,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:14:09,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 126 treesize of output 250 [2022-11-19 08:14:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-19 08:14:09,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:42,420 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 117 DAG size of output: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:15:46,528 WARN L233 SmtUtils]: Spent 45.80s on a formula simplification. DAG size of input: 132 DAG size of output: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:17:49,235 WARN L233 SmtUtils]: Spent 1.69m on a formula simplification. DAG size of input: 147 DAG size of output: 139 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:18:31,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:18:31,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 423 treesize of output 427 [2022-11-19 08:21:40,097 WARN L233 SmtUtils]: Spent 1.02m on a formula simplification that was a NOOP. DAG size: 132 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)