./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 66b03bf685aae9720ef4af0fb91907139a878375cd48373b4439b53b2302a22a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:25:40,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:25:40,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:25:40,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:25:40,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:25:40,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:25:40,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:25:40,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:25:40,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:25:40,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:25:40,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:25:40,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:25:40,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:25:40,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:25:40,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:25:40,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:25:40,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:25:40,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:25:40,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:25:40,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:25:40,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:25:40,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:25:40,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:25:40,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:25:40,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:25:40,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:25:40,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:25:40,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:25:40,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:25:40,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:25:40,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:25:40,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:25:40,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:25:40,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:25:40,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:25:40,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:25:40,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:25:40,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:25:40,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:25:40,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:25:40,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:25:40,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:25:40,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:25:40,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:25:40,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:25:40,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:25:40,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:25:40,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:25:40,453 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:25:40,453 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:25:40,453 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:25:40,453 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:25:40,453 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:25:40,453 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:25:40,454 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:25:40,454 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:25:40,454 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:25:40,454 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:25:40,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:25:40,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:25:40,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:25:40,455 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:25:40,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:25:40,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:25:40,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:25:40,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:25:40,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:25:40,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:25:40,456 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:25:40,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:25:40,457 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:25:40,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:25:40,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:25:40,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:25:40,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:25:40,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:25:40,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:25:40,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:25:40,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:25:40,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:25:40,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:25:40,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:25:40,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:25:40,459 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_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66b03bf685aae9720ef4af0fb91907139a878375cd48373b4439b53b2302a22a [2022-12-14 08:25:40,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:25:40,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:25:40,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:25:40,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:25:40,645 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:25:40,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/reducercommutativity/rangesum20.i [2022-12-14 08:25:43,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:25:43,383 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:25:43,384 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/sv-benchmarks/c/reducercommutativity/rangesum20.i [2022-12-14 08:25:43,390 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/data/ab5e76125/e1572ecc50d446609ca958abc237ddda/FLAG03bb33f59 [2022-12-14 08:25:43,403 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/data/ab5e76125/e1572ecc50d446609ca958abc237ddda [2022-12-14 08:25:43,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:25:43,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:25:43,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:25:43,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:25:43,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:25:43,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a84b5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43, skipping insertion in model container [2022-12-14 08:25:43,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:25:43,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:25:43,594 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2022-12-14 08:25:43,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:25:43,608 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:25:43,629 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2022-12-14 08:25:43,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:25:43,644 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:25:43,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43 WrapperNode [2022-12-14 08:25:43,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:25:43,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:25:43,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:25:43,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:25:43,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,680 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-12-14 08:25:43,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:25:43,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:25:43,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:25:43,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:25:43,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:25:43,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:25:43,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:25:43,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:25:43,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (1/1) ... [2022-12-14 08:25:43,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:25:43,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:43,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:25:43,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:25:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:25:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:25:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:25:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:25:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:25:43,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:25:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:25:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2022-12-14 08:25:43,773 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2022-12-14 08:25:43,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:25:43,838 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:25:43,840 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:25:43,956 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:25:44,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:25:44,017 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 08:25:44,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:25:44 BoogieIcfgContainer [2022-12-14 08:25:44,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:25:44,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:25:44,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:25:44,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:25:44,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:25:43" (1/3) ... [2022-12-14 08:25:44,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b0adf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:25:44, skipping insertion in model container [2022-12-14 08:25:44,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:25:43" (2/3) ... [2022-12-14 08:25:44,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b0adf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:25:44, skipping insertion in model container [2022-12-14 08:25:44,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:25:44" (3/3) ... [2022-12-14 08:25:44,026 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2022-12-14 08:25:44,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:25:44,041 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:25:44,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:25:44,085 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;@3d845ea6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:25:44,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:25:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 08:25:44,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:44,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:44,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash -362891911, now seen corresponding path program 1 times [2022-12-14 08:25:44,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:44,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172187525] [2022-12-14 08:25:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:44,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:44,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:44,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172187525] [2022-12-14 08:25:44,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 08:25:44,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117370873] [2022-12-14 08:25:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:44,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:44,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:44,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:44,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:25:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:44,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:25:44,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:25:44,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:25:44,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117370873] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:25:44,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:25:44,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:25:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760771035] [2022-12-14 08:25:44,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:25:44,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:25:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:25:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:25:44,375 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 08:25:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:44,416 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-12-14 08:25:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:25:44,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-12-14 08:25:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:44,424 INFO L225 Difference]: With dead ends: 33 [2022-12-14 08:25:44,424 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 08:25:44,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:25:44,430 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:44,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 08:25:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 08:25:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-12-14 08:25:44,458 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-12-14 08:25:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:44,459 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-12-14 08:25:44,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 08:25:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-12-14 08:25:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:25:44,460 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:44,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:44,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:25:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:44,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1234920756, now seen corresponding path program 1 times [2022-12-14 08:25:44,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:44,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618523896] [2022-12-14 08:25:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:44,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:44,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618523896] [2022-12-14 08:25:44,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 08:25:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542301349] [2022-12-14 08:25:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:44,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:44,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:44,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:25:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:44,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:25:44,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:25:44,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:25:44,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542301349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:25:44,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:25:44,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:25:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367642437] [2022-12-14 08:25:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:25:44,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:25:44,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:25:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:25:44,802 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:25:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:44,821 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-12-14 08:25:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:25:44,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-12-14 08:25:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:44,823 INFO L225 Difference]: With dead ends: 29 [2022-12-14 08:25:44,823 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 08:25:44,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:25:44,824 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:44,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 08:25:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 08:25:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 08:25:44,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-12-14 08:25:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:44,829 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 08:25:44,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:25:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 08:25:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 08:25:44,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:44,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:44,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:25:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 08:25:45,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash -877476800, now seen corresponding path program 1 times [2022-12-14 08:25:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:45,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497253426] [2022-12-14 08:25:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:45,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:45,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:45,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497253426] [2022-12-14 08:25:45,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 08:25:45,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679437786] [2022-12-14 08:25:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:45,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:45,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:45,122 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:45,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:25:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:25:45,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:25:45,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:25:45,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679437786] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:25:45,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:25:45,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:25:45,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807610444] [2022-12-14 08:25:45,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:25:45,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:25:45,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:45,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:25:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:25:45,225 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:25:45,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:45,245 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 08:25:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:25:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-12-14 08:25:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:45,246 INFO L225 Difference]: With dead ends: 27 [2022-12-14 08:25:45,246 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 08:25:45,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:25:45,247 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:45,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 08:25:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 08:25:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-12-14 08:25:45,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-12-14 08:25:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:45,251 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-12-14 08:25:45,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 08:25:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-12-14 08:25:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 08:25:45,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:45,252 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:45,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:25:45,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 08:25:45,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash 140313158, now seen corresponding path program 1 times [2022-12-14 08:25:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:45,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486197632] [2022-12-14 08:25:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:45,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:45,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486197632] [2022-12-14 08:25:45,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 08:25:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380798313] [2022-12-14 08:25:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:45,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:45,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:45,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:25:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:25:45,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:25:45,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:25:45,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380798313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:45,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676716416] [2022-12-14 08:25:45,752 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:45,752 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:45,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:45,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:45,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:45,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:45,827 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:25:45,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 08:25:45,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:45,858 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:45,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:45,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:25:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:46,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:46,023 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:25:46,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 220 treesize of output 208 [2022-12-14 08:25:46,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:46,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:46,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 08:25:46,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:46,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:46,597 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:46,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:47,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '576#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:47,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:47,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:47,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2022-12-14 08:25:47,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445682128] [2022-12-14 08:25:47,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:47,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:25:47,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:47,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:25:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:25:47,333 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:25:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:47,360 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-12-14 08:25:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:25:47,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-12-14 08:25:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:47,361 INFO L225 Difference]: With dead ends: 36 [2022-12-14 08:25:47,361 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 08:25:47,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:25:47,362 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:47,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 08:25:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 08:25:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 08:25:47,367 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-12-14 08:25:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:47,367 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 08:25:47,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:25:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 08:25:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:25:47,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:47,368 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:47,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:25:47,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:47,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:47,571 INFO L85 PathProgramCache]: Analyzing trace with hash 139189043, now seen corresponding path program 2 times [2022-12-14 08:25:47,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:47,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779157184] [2022-12-14 08:25:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:47,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:47,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882388635] [2022-12-14 08:25:47,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:25:47,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:47,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:47,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:47,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:25:47,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:25:47,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:25:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 08:25:47,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 08:25:47,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:47,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779157184] [2022-12-14 08:25:47,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:47,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882388635] [2022-12-14 08:25:47,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882388635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:47,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128284158] [2022-12-14 08:25:47,793 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:47,794 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:47,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:47,794 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:47,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:47,821 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:47,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:47,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:47,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 08:25:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:47,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:25:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:47,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:25:47,913 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:25:47,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 209 [2022-12-14 08:25:47,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:48,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:48,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:48,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:25:48,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 08:25:48,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:48,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:48,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:48,306 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:48,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:48,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '847#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:48,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:48,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:48,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-14 08:25:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831599718] [2022-12-14 08:25:48,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:48,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:25:48,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:25:48,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:25:48,816 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 08:25:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:48,832 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-12-14 08:25:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:25:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-12-14 08:25:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:48,833 INFO L225 Difference]: With dead ends: 38 [2022-12-14 08:25:48,833 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 08:25:48,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:25:48,833 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:48,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 08:25:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 08:25:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 08:25:48,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-12-14 08:25:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:48,836 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 08:25:48,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 08:25:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 08:25:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 08:25:48,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:48,837 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:48,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 08:25:49,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:49,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash 378555129, now seen corresponding path program 3 times [2022-12-14 08:25:49,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:49,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854224679] [2022-12-14 08:25:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:49,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:49,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680054895] [2022-12-14 08:25:49,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:25:49,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:49,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:49,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:49,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:25:49,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:25:49,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:25:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 08:25:49,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 08:25:49,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854224679] [2022-12-14 08:25:49,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680054895] [2022-12-14 08:25:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680054895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [380307297] [2022-12-14 08:25:49,219 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:49,219 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:49,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:49,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:49,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:49,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:49,238 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:49,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:49,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 08:25:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:49,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:25:49,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:49,307 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:25:49,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 220 treesize of output 208 [2022-12-14 08:25:49,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:49,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:49,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:49,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 08:25:49,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:49,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:49,643 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:49,736 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:50,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1188#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:50,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:50,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:50,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-12-14 08:25:50,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209281540] [2022-12-14 08:25:50,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:50,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:25:50,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:25:50,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:25:50,149 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:25:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:50,168 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-12-14 08:25:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:25:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2022-12-14 08:25:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:50,169 INFO L225 Difference]: With dead ends: 48 [2022-12-14 08:25:50,169 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 08:25:50,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:25:50,170 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:50,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:50,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 08:25:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 08:25:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-12-14 08:25:50,172 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 37 [2022-12-14 08:25:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:50,173 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-12-14 08:25:50,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:25:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-12-14 08:25:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 08:25:50,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:50,173 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:50,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:25:50,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 08:25:50,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1272494041, now seen corresponding path program 4 times [2022-12-14 08:25:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:50,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902419142] [2022-12-14 08:25:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:50,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:50,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:50,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707702378] [2022-12-14 08:25:50,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:25:50,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:50,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:50,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:50,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:25:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:25:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 08:25:50,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 08:25:50,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902419142] [2022-12-14 08:25:50,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707702378] [2022-12-14 08:25:50,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707702378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937793868] [2022-12-14 08:25:50,652 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:50,652 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:50,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:50,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:50,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:50,672 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:25:50,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 08:25:50,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:50,686 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:50,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:50,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:25:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:50,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:25:50,772 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:25:50,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 209 [2022-12-14 08:25:50,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:50,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:51,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:51,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 08:25:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:51,044 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 08:25:51,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 08:25:51,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:51,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:51,185 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:51,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:51,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1607#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:51,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:51,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:51,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-12-14 08:25:51,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595536955] [2022-12-14 08:25:51,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:51,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 08:25:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 08:25:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:25:51,807 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:25:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:51,839 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2022-12-14 08:25:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 08:25:51,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-12-14 08:25:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:51,840 INFO L225 Difference]: With dead ends: 58 [2022-12-14 08:25:51,840 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 08:25:51,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:25:51,841 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:51,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 08:25:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 08:25:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-12-14 08:25:51,844 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 43 [2022-12-14 08:25:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:51,844 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-12-14 08:25:51,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 08:25:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-12-14 08:25:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 08:25:51,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:51,845 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:51,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 08:25:52,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:52,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:52,048 INFO L85 PathProgramCache]: Analyzing trace with hash -850003975, now seen corresponding path program 5 times [2022-12-14 08:25:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:52,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255042681] [2022-12-14 08:25:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:52,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:52,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:52,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332068447] [2022-12-14 08:25:52,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:25:52,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:52,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:52,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:52,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:25:52,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:25:52,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:52,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:25:52,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-12-14 08:25:52,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-12-14 08:25:52,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:52,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255042681] [2022-12-14 08:25:52,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:52,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332068447] [2022-12-14 08:25:52,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332068447] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:52,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031258186] [2022-12-14 08:25:52,207 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:52,207 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:52,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:52,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:52,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:52,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:52,226 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:52,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:52,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:52,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 08:25:52,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:52,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:25:52,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:52,289 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:25:52,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 220 treesize of output 208 [2022-12-14 08:25:52,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:52,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:52,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 08:25:52,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:52,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:52,615 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:52,714 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:53,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2110#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:53,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:53,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:53,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-14 08:25:53,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679365450] [2022-12-14 08:25:53,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:53,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:25:53,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:25:53,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:25:53,177 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 08:25:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:53,195 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-12-14 08:25:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:25:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2022-12-14 08:25:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:53,197 INFO L225 Difference]: With dead ends: 55 [2022-12-14 08:25:53,197 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 08:25:53,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:25:53,198 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:53,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 08:25:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 08:25:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-12-14 08:25:53,204 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 53 [2022-12-14 08:25:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:53,204 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-12-14 08:25:53,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 08:25:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-12-14 08:25:53,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 08:25:53,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:53,205 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:53,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 08:25:53,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 08:25:53,406 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1045193401, now seen corresponding path program 6 times [2022-12-14 08:25:53,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:53,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895521980] [2022-12-14 08:25:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:53,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:53,441 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:53,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139314700] [2022-12-14 08:25:53,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:25:53,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:53,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:53,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:53,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:25:53,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:25:53,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:53,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:25:53,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-12-14 08:25:53,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-12-14 08:25:53,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:53,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895521980] [2022-12-14 08:25:53,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:53,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139314700] [2022-12-14 08:25:53,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139314700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:53,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173278634] [2022-12-14 08:25:53,577 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:53,577 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:53,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:53,577 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:53,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:53,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:53,602 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:53,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:53,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 08:25:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:53,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:25:53,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:53,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:53,689 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:25:53,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 220 treesize of output 208 [2022-12-14 08:25:53,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:53,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:53,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:25:53,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 08:25:53,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:53,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:53,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:53,980 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:54,063 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:54,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2639#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:54,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:54,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:54,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-14 08:25:54,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34570060] [2022-12-14 08:25:54,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:54,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:25:54,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:25:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:25:54,420 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:25:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:54,444 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-12-14 08:25:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:25:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-12-14 08:25:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:54,445 INFO L225 Difference]: With dead ends: 69 [2022-12-14 08:25:54,446 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 08:25:54,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:25:54,447 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:54,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 08:25:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 08:25:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-12-14 08:25:54,453 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 56 [2022-12-14 08:25:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:54,453 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-12-14 08:25:54,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:25:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-12-14 08:25:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 08:25:54,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:54,454 INFO L195 NwaCegarLoop]: trace histogram [30, 20, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:54,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 08:25:54,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:54,656 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:54,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1040830727, now seen corresponding path program 7 times [2022-12-14 08:25:54,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:54,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847959171] [2022-12-14 08:25:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:54,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:54,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:54,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374708181] [2022-12-14 08:25:54,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:25:54,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:54,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:54,744 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:54,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:25:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:25:54,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:25:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-12-14 08:25:54,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-12-14 08:25:55,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:55,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847959171] [2022-12-14 08:25:55,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374708181] [2022-12-14 08:25:55,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374708181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727361622] [2022-12-14 08:25:55,003 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:55,004 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:55,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:55,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:55,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:55,022 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:55,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:55,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 08:25:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:55,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:25:55,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:55,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:25:55,101 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:25:55,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 209 [2022-12-14 08:25:55,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:55,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:55,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:25:55,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 08:25:55,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:55,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:55,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:55,413 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:55,495 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:56,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3324#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:56,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:56,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:56,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-12-14 08:25:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558389263] [2022-12-14 08:25:56,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:56,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 08:25:56,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 08:25:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:25:56,008 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:25:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:56,040 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-12-14 08:25:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 08:25:56,040 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 74 [2022-12-14 08:25:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:56,041 INFO L225 Difference]: With dead ends: 85 [2022-12-14 08:25:56,041 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 08:25:56,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:25:56,043 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:56,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:56,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 08:25:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-14 08:25:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-12-14 08:25:56,047 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 74 [2022-12-14 08:25:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:56,047 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-12-14 08:25:56,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:25:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-12-14 08:25:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 08:25:56,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:56,048 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:56,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 08:25:56,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:25:56,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1398118585, now seen corresponding path program 8 times [2022-12-14 08:25:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:56,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790108709] [2022-12-14 08:25:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:56,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:56,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205186172] [2022-12-14 08:25:56,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:25:56,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:56,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:56,320 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:56,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:25:56,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:25:56,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:56,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:25:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 886 proven. 10 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-12-14 08:25:56,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-12-14 08:25:56,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:56,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790108709] [2022-12-14 08:25:56,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:56,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205186172] [2022-12-14 08:25:56,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205186172] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:56,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630880092] [2022-12-14 08:25:56,521 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:56,521 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:56,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:56,521 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:56,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:56,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:56,542 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:56,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:56,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 08:25:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:56,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:25:56,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:56,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:25:56,622 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:25:56,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 209 [2022-12-14 08:25:56,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:56,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:56,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:25:56,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 08:25:56,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:56,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:56,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:56,923 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:57,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:57,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4231#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:57,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:57,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:57,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-14 08:25:57,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909274233] [2022-12-14 08:25:57,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:57,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:25:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:57,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:25:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:25:57,501 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 08:25:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:57,529 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2022-12-14 08:25:57,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:25:57,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 104 [2022-12-14 08:25:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:57,530 INFO L225 Difference]: With dead ends: 93 [2022-12-14 08:25:57,530 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 08:25:57,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:25:57,531 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:57,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 08:25:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-12-14 08:25:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-12-14 08:25:57,537 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 104 [2022-12-14 08:25:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:57,537 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-12-14 08:25:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 08:25:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-12-14 08:25:57,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 08:25:57,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:57,539 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:57,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 08:25:57,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:57,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1680043847, now seen corresponding path program 9 times [2022-12-14 08:25:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:57,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616288774] [2022-12-14 08:25:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:57,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:57,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:57,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817926429] [2022-12-14 08:25:57,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:25:57,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:57,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:57,834 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:57,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:25:57,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:25:57,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:25:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 886 proven. 55 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-12-14 08:25:58,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-12-14 08:25:58,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:25:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616288774] [2022-12-14 08:25:58,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:25:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817926429] [2022-12-14 08:25:58,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817926429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458884006] [2022-12-14 08:25:58,128 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 08:25:58,128 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:25:58,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:25:58,128 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:25:58,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:25:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:58,147 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:25:58,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 08:25:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:58,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 08:25:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:58,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:25:58,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:58,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:58,206 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:25:58,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 220 treesize of output 208 [2022-12-14 08:25:58,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:25:58,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:58,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 08:25:58,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 08:25:58,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 08:25:58,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:25:58,491 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2022-12-14 08:25:58,575 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:25:59,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5213#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 19 |ULTIMATE.start_main_~i~2#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 20 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:25:59,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:25:59,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:25:59,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-12-14 08:25:59,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157294068] [2022-12-14 08:25:59,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:25:59,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:25:59,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:25:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:25:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 08:25:59,011 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 08:25:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:25:59,037 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-12-14 08:25:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 08:25:59,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 110 [2022-12-14 08:25:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:25:59,038 INFO L225 Difference]: With dead ends: 102 [2022-12-14 08:25:59,039 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 08:25:59,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 294 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 08:25:59,040 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:25:59,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:25:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 08:25:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-12-14 08:25:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 08:25:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-12-14 08:25:59,045 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 110 [2022-12-14 08:25:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:59,046 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-12-14 08:25:59,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 08:25:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-12-14 08:25:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 08:25:59,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:59,047 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 19, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:59,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 08:25:59,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 08:25:59,249 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:25:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:59,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1387793913, now seen corresponding path program 10 times [2022-12-14 08:25:59,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:25:59,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895268490] [2022-12-14 08:25:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:25:59,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:25:59,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:25:59,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969192579] [2022-12-14 08:25:59,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:25:59,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:59,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:59,353 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:59,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:26:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:26:04,806 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 08:26:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:26:09,704 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 08:26:09,704 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 08:26:09,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 08:26:09,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 08:26:09,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 08:26:09,911 INFO L445 BasicCegarLoop]: Path program histogram: [10, 1, 1, 1] [2022-12-14 08:26:09,915 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 08:26:10,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 08:26:10 BoogieIcfgContainer [2022-12-14 08:26:10,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 08:26:10,002 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 08:26:10,002 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 08:26:10,002 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 08:26:10,003 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:25:44" (3/4) ... [2022-12-14 08:26:10,004 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 08:26:10,070 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 08:26:10,070 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 08:26:10,071 INFO L158 Benchmark]: Toolchain (without parser) took 26663.45ms. Allocated memory was 130.0MB in the beginning and 195.0MB in the end (delta: 65.0MB). Free memory was 89.8MB in the beginning and 118.6MB in the end (delta: -28.8MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. [2022-12-14 08:26:10,071 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 130.0MB. Free memory is still 71.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:26:10,071 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.64ms. Allocated memory is still 130.0MB. Free memory was 89.8MB in the beginning and 79.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:26:10,072 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.57ms. Allocated memory is still 130.0MB. Free memory was 79.1MB in the beginning and 77.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:26:10,072 INFO L158 Benchmark]: Boogie Preprocessor took 25.54ms. Allocated memory is still 130.0MB. Free memory was 77.6MB in the beginning and 76.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:26:10,072 INFO L158 Benchmark]: RCFGBuilder took 311.91ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 76.1MB in the beginning and 131.5MB in the end (delta: -55.4MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2022-12-14 08:26:10,072 INFO L158 Benchmark]: TraceAbstraction took 25980.91ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 130.4MB in the beginning and 128.0MB in the end (delta: 2.4MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. [2022-12-14 08:26:10,073 INFO L158 Benchmark]: Witness Printer took 68.25ms. Allocated memory is still 195.0MB. Free memory was 128.0MB in the beginning and 118.6MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 08:26:10,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 130.0MB. Free memory is still 71.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.64ms. Allocated memory is still 130.0MB. Free memory was 89.8MB in the beginning and 79.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.57ms. Allocated memory is still 130.0MB. Free memory was 79.1MB in the beginning and 77.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.54ms. Allocated memory is still 130.0MB. Free memory was 77.6MB in the beginning and 76.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 311.91ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 76.1MB in the beginning and 131.5MB in the end (delta: -55.4MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * TraceAbstraction took 25980.91ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 130.4MB in the beginning and 128.0MB in the end (delta: 2.4MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. * Witness Printer took 68.25ms. Allocated memory is still 195.0MB. Free memory was 128.0MB in the beginning and 118.6MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[20]; [L43] CALL init_nondet(x) [L16] int i; [L17] i = 0 VAL [i=0, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=1, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=2, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=3, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=4, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=5, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=6, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=7, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=8, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=9, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=10, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=11, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=12, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=13, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=14, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=15, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=16, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=17, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=18, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=19, x={5:0}, x={5:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=20, x={5:0}, x={5:0}] [L17] COND FALSE !(i < 20) [L43] RET init_nondet(x) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; VAL [x={5:0}] [L49] CALL, EXPR rangesum(x) VAL [x={5:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={5:0}, x={5:0}] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=4, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=5, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=6, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=7, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=8, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=9, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=10, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=11, ret=0, x={5:0}, x={5:0}, x[i]=89] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=12, ret=-7, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=13, ret=-8, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=3, i=14, ret=-11, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=4, i=15, ret=-8, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=5, i=16, ret=0, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=6, i=17, ret=3, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=7, i=18, ret=-16, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=8, i=19, ret=-10, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=9, i=20, ret=-16, x={5:0}, x={5:0}, x[i]=0] [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] RET, EXPR rangesum(x) VAL [rangesum(x)=-1, x={5:0}] [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp VAL [ret=-1, temp=-11, x={5:0}] [L52] CALL, EXPR rangesum(x) VAL [x={5:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={5:0}, x={5:0}] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=4, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=5, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=6, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=7, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=8, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=9, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=10, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=11, ret=0, x={5:0}, x={5:0}, x[i]=174] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=12, ret=-7, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=13, ret=-8, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=3, i=14, ret=-11, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=4, i=15, ret=-8, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=5, i=16, ret=0, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=6, i=17, ret=3, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=7, i=18, ret=-16, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=8, i=19, ret=-10, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=9, i=20, ret=-16, x={5:0}, x={5:0}, x[i]=0] [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] RET, EXPR rangesum(x) VAL [rangesum(x)=-1, ret=-1, temp=-11, x={5:0}] [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; VAL [i=0, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=1, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=2, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=3, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=4, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=5, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=6, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=7, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=8, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=9, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=10, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=11, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=12, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=13, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=14, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=15, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=16, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=17, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=18, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=19, ret=-1, ret2=-1, temp=-9, x={5:0}] [L54] COND FALSE !(i<20 -1) [L57] x[20 -1] = temp VAL [i=19, ret=-1, ret2=-1, temp=-9, x={5:0}] [L58] CALL, EXPR rangesum(x) VAL [x={5:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={5:0}, x={5:0}] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=4, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=5, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=6, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=7, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=8, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=9, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=10, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=11, ret=0, x={5:0}, x={5:0}, x[i]=302] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=12, ret=-1, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=13, ret=-4, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=3, i=14, ret=-1, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=4, i=15, ret=7, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=5, i=16, ret=10, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=6, i=17, ret=-9, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=7, i=18, ret=-3, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=8, i=19, ret=-9, x={5:0}, x={5:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=9, i=20, ret=-18, x={5:0}, x={5:0}, x[i]=0] [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] RET, EXPR rangesum(x) VAL [i=19, rangesum(x)=-2, ret=-1, ret2=-1, temp=-9, x={5:0}] [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 VAL [i=19, ret=-1, ret2=-1, ret5=-2, temp=-9, x={5:0}] [L61] reach_error() VAL [i=19, ret=-1, ret2=-1, ret5=-2, temp=-9, x={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.8s, OverallIterations: 13, TraceHistogramMax: 60, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 484 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 339 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 362 IncrementalHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 145 mSDtfsCounter, 362 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1634 GetRequests, 1414 SyntacticMatches, 8 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=12, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 804 NumberOfCodeBlocks, 698 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1104 ConstructedInterpolants, 0 QuantifiedInterpolants, 1326 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3103 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 11657/12349 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 08:26:10,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01bacf1-7428-47bb-9bdb-8ab86b645d74/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE