./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/mods.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/mods.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f15d84a1f588b4a2fae1a1f53311fed1d9572550b31409f886696465cdc8f8ba --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:39:34,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:39:34,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:39:34,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:39:34,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:39:34,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:39:34,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:39:34,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:39:34,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:39:34,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:39:34,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:39:34,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:39:34,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:39:34,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:39:34,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:39:34,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:39:34,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:39:34,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:39:34,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:39:34,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:39:34,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:39:34,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:39:34,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:39:34,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:39:34,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:39:34,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:39:34,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:39:34,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:39:34,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:39:34,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:39:34,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:39:34,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:39:34,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:39:34,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:39:34,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:39:34,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:39:34,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:39:34,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:39:34,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:39:34,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:39:34,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:39:34,609 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:39:34,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:39:34,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:39:34,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:39:34,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:39:34,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:39:34,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:39:34,652 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:39:34,652 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:39:34,652 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:39:34,652 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:39:34,653 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:39:34,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:39:34,654 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:39:34,654 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:39:34,654 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:39:34,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:39:34,655 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:39:34,655 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:39:34,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:39:34,656 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:39:34,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:39:34,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:39:34,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:39:34,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:39:34,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:39:34,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:39:34,658 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:39:34,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:39:34,658 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:39:34,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:39:34,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:39:34,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:39:34,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:39:34,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:39:34,659 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:39:34,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:39:34,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:39:34,660 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:39:34,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:39:34,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:39:34,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:39:34,661 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_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f15d84a1f588b4a2fae1a1f53311fed1d9572550b31409f886696465cdc8f8ba [2022-11-26 00:39:34,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:39:34,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:39:34,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:39:34,997 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:39:34,997 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:39:34,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-fpi/mods.c [2022-11-26 00:39:37,964 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:39:38,139 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:39:38,140 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/sv-benchmarks/c/array-fpi/mods.c [2022-11-26 00:39:38,146 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/data/e7b347196/060fa47591794590a5e13e281743ffb0/FLAG88f160fc1 [2022-11-26 00:39:38,162 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/data/e7b347196/060fa47591794590a5e13e281743ffb0 [2022-11-26 00:39:38,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:39:38,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:39:38,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:39:38,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:39:38,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:39:38,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@302892a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38, skipping insertion in model container [2022-11-26 00:39:38,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:39:38,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:39:38,361 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_f81346b2-f1e8-46f0-96f7-78fdc80be761/sv-benchmarks/c/array-fpi/mods.c[587,600] [2022-11-26 00:39:38,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:39:38,392 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:39:38,411 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_f81346b2-f1e8-46f0-96f7-78fdc80be761/sv-benchmarks/c/array-fpi/mods.c[587,600] [2022-11-26 00:39:38,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:39:38,448 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:39:38,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38 WrapperNode [2022-11-26 00:39:38,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:39:38,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:39:38,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:39:38,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:39:38,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,502 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 104 [2022-11-26 00:39:38,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:39:38,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:39:38,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:39:38,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:39:38,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,548 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:39:38,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:39:38,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:39:38,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:39:38,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (1/1) ... [2022-11-26 00:39:38,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:39:38,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:38,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:39:38,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:39:38,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:39:38,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:39:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:39:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:39:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:39:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:39:38,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:39:38,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:39:38,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:39:38,757 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:39:38,759 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:39:39,059 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:39:39,105 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:39:39,106 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-26 00:39:39,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:39:39 BoogieIcfgContainer [2022-11-26 00:39:39,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:39:39,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:39:39,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:39:39,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:39:39,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:39:38" (1/3) ... [2022-11-26 00:39:39,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be1c81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:39:39, skipping insertion in model container [2022-11-26 00:39:39,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:39:38" (2/3) ... [2022-11-26 00:39:39,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be1c81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:39:39, skipping insertion in model container [2022-11-26 00:39:39,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:39:39" (3/3) ... [2022-11-26 00:39:39,118 INFO L112 eAbstractionObserver]: Analyzing ICFG mods.c [2022-11-26 00:39:39,138 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:39:39,138 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:39:39,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:39:39,208 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;@7c5ad710, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:39:39,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:39:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:39:39,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:39,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:39,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:39,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1473824747, now seen corresponding path program 1 times [2022-11-26 00:39:39,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:39,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434575965] [2022-11-26 00:39:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:39,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434575965] [2022-11-26 00:39:39,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434575965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:39,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:39,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:39:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676836515] [2022-11-26 00:39:39,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:39,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:39:39,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:39:39,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:39:39,605 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:39,679 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-11-26 00:39:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:39:39,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:39:39,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:39,689 INFO L225 Difference]: With dead ends: 24 [2022-11-26 00:39:39,690 INFO L226 Difference]: Without dead ends: 12 [2022-11-26 00:39:39,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:39:39,696 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:39,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-26 00:39:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-26 00:39:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-26 00:39:39,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2022-11-26 00:39:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:39,730 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-26 00:39:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-26 00:39:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:39:39,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:39,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:39,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:39:39,732 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash -332942029, now seen corresponding path program 1 times [2022-11-26 00:39:39,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:39,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112457074] [2022-11-26 00:39:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:39,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:39,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:39,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112457074] [2022-11-26 00:39:39,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112457074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:39,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:39:39,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:39:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093857977] [2022-11-26 00:39:39,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:39,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:39:39,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:39,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:39:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:39:39,968 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:40,030 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-11-26 00:39:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:39:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:39:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:40,033 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:39:40,033 INFO L226 Difference]: Without dead ends: 20 [2022-11-26 00:39:40,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:39:40,041 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:40,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 6 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:39:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-26 00:39:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-11-26 00:39:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-26 00:39:40,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-11-26 00:39:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:40,060 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-26 00:39:40,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-26 00:39:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:39:40,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:40,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:40,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:39:40,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1080912201, now seen corresponding path program 1 times [2022-11-26 00:39:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:40,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579069727] [2022-11-26 00:39:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:40,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:40,114 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:39:40,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100644978] [2022-11-26 00:39:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:40,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:40,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:40,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:39:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:40,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-26 00:39:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:40,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:39:40,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:39:40,354 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 19 treesize of output 18 [2022-11-26 00:39:40,433 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 39 treesize of output 26 [2022-11-26 00:39:40,503 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 36 treesize of output 23 [2022-11-26 00:39:40,621 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 84 treesize of output 51 [2022-11-26 00:39:40,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 53 treesize of output 29 [2022-11-26 00:39:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:40,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:12,447 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_53 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= (+ (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) v_ArrVal_53)) (= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_53)))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse1 (+ (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_53))) (mod .cse1 (+ (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))))) 0)))) is different from false [2022-11-26 00:40:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-26 00:40:19,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:19,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579069727] [2022-11-26 00:40:19,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:40:19,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100644978] [2022-11-26 00:40:19,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100644978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:19,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476731] [2022-11-26 00:40:19,990 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:40:19,990 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:40:19,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:40:20,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:40:20,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:40:20,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,169 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:40:20,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:40:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:40:20,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:40:20,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:40:20,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,600 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-26 00:40:20,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:40:20,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:40:20,775 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:40:20,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:40:20,875 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:40:20,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-26 00:40:20,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:20,991 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:40:20,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-26 00:40:21,120 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-26 00:40:21,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-26 00:40:21,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:21,270 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-11-26 00:40:21,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2022-11-26 00:40:21,575 INFO L321 Elim1Store]: treesize reduction 63, result has 38.8 percent of original size [2022-11-26 00:40:21,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2022-11-26 00:40:21,658 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:40:22,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '235#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:40:22,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:40:22,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:40:22,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-26 00:40:22,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750330105] [2022-11-26 00:40:22,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:22,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:40:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:40:22,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=554, Unknown=12, NotChecked=48, Total=702 [2022-11-26 00:40:22,714 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:38,671 WARN L233 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 46 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:40:40,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:42,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:44,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:47,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-26 00:41:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:07,152 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-26 00:41:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:41:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:41:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:07,155 INFO L225 Difference]: With dead ends: 51 [2022-11-26 00:41:07,155 INFO L226 Difference]: Without dead ends: 49 [2022-11-26 00:41:07,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 74.8s TimeCoverageRelationStatistics Valid=244, Invalid=1462, Unknown=20, NotChecked=80, Total=1806 [2022-11-26 00:41:07,157 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 84 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:07,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 78 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 282 Invalid, 3 Unknown, 29 Unchecked, 9.7s Time] [2022-11-26 00:41:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-26 00:41:07,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2022-11-26 00:41:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-11-26 00:41:07,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 13 [2022-11-26 00:41:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:07,167 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-11-26 00:41:07,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-11-26 00:41:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:41:07,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:07,169 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:07,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:07,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:07,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1737417492, now seen corresponding path program 2 times [2022-11-26 00:41:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:07,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714822703] [2022-11-26 00:41:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:07,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:41:07,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859453442] [2022-11-26 00:41:07,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:41:07,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:07,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:07,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:07,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:41:07,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:41:07,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:07,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:41:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:41:07,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:41:07,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:07,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714822703] [2022-11-26 00:41:07,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:41:07,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859453442] [2022-11-26 00:41:07,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859453442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:07,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930093506] [2022-11-26 00:41:07,560 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:07,560 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:07,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:07,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:07,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:07,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,605 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:41:07,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-26 00:41:07,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,713 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:41:07,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:41:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:41:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:41:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:07,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:07,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:08,028 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-26 00:41:08,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 27 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:41:08,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:41:08,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:08,235 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:41:08,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:41:08,314 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:41:08,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-26 00:41:08,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:08,369 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:41:08,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-26 00:41:08,447 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-26 00:41:08,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-26 00:41:08,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:08,692 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-11-26 00:41:08,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 68 [2022-11-26 00:41:08,953 INFO L321 Elim1Store]: treesize reduction 63, result has 38.8 percent of original size [2022-11-26 00:41:08,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2022-11-26 00:41:09,021 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:09,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '474#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:09,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:09,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:41:09,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-26 00:41:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386717691] [2022-11-26 00:41:09,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:09,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:41:09,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:41:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:41:09,655 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:09,799 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2022-11-26 00:41:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:41:09,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:41:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:09,800 INFO L225 Difference]: With dead ends: 61 [2022-11-26 00:41:09,800 INFO L226 Difference]: Without dead ends: 35 [2022-11-26 00:41:09,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:41:09,801 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:09,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:41:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-26 00:41:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2022-11-26 00:41:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-11-26 00:41:09,810 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2022-11-26 00:41:09,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:09,810 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-11-26 00:41:09,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-11-26 00:41:09,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:41:09,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:09,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:09,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:10,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:10,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash 996737740, now seen corresponding path program 3 times [2022-11-26 00:41:10,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:10,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753502360] [2022-11-26 00:41:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:10,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:10,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:41:10,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687184668] [2022-11-26 00:41:10,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:41:10,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:10,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:10,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:10,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:41:10,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:41:10,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:41:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:41:10,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:41:10,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:10,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753502360] [2022-11-26 00:41:10,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:41:10,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687184668] [2022-11-26 00:41:10,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687184668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:10,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724037527] [2022-11-26 00:41:10,209 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:10,209 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:10,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:10,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:10,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,303 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:41:10,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:41:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,399 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:41:10,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:41:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:41:10,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:41:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:10,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:10,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:10,711 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-26 00:41:10,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 27 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:41:10,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:41:10,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:10,973 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:41:10,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:41:11,047 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:41:11,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-26 00:41:11,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:11,123 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:41:11,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-26 00:41:11,208 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-26 00:41:11,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-26 00:41:11,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:11,304 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-11-26 00:41:11,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 68 [2022-11-26 00:41:11,773 INFO L321 Elim1Store]: treesize reduction 63, result has 38.8 percent of original size [2022-11-26 00:41:11,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2022-11-26 00:41:11,827 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:12,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '713#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:12,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:12,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:41:12,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-26 00:41:12,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414362915] [2022-11-26 00:41:12,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:12,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:41:12,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:41:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:41:12,374 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:12,549 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-26 00:41:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:41:12,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:41:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:12,551 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:41:12,551 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:41:12,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:41:12,553 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:12,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 18 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:41:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:41:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-26 00:41:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-26 00:41:12,557 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2022-11-26 00:41:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:12,557 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-26 00:41:12,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-26 00:41:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:41:12,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:12,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:12,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:12,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:12,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1834853461, now seen corresponding path program 4 times [2022-11-26 00:41:12,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:12,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919342459] [2022-11-26 00:41:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:12,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:12,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:41:12,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829688632] [2022-11-26 00:41:12,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:41:12,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:12,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:12,805 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:12,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:41:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-26 00:41:12,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:12,925 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 11 treesize of output 7 [2022-11-26 00:41:12,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:41:12,957 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 19 treesize of output 18 [2022-11-26 00:41:13,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,019 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 28 treesize of output 30 [2022-11-26 00:41:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,097 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 0 case distinctions, treesize of input 48 treesize of output 38 [2022-11-26 00:41:13,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,142 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 0 case distinctions, treesize of input 54 treesize of output 38 [2022-11-26 00:41:13,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,238 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 0 case distinctions, treesize of input 57 treesize of output 37 [2022-11-26 00:41:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,285 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 0 case distinctions, treesize of input 63 treesize of output 41 [2022-11-26 00:41:13,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:13,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 371 treesize of output 177 [2022-11-26 00:41:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:13,542 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 0 case distinctions, treesize of input 57 treesize of output 41 [2022-11-26 00:41:13,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 53 treesize of output 29 [2022-11-26 00:41:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:13,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:16,782 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_186 Int)) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_186)))) (let ((.cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ v_ArrVal_186 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (mod .cse0 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse2 .cse3 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse4 .cse3))))) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))))) 0) (not (<= (+ (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) v_ArrVal_186))))) is different from false [2022-11-26 00:41:18,857 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_186 Int) (v_ArrVal_184 Int)) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse6 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_186)))) (let ((.cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ v_ArrVal_186 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (mod .cse0 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse2 .cse3 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse4 .cse3))))) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))))) 0) (not (<= (+ (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))) v_ArrVal_184)) (not (<= (+ v_ArrVal_184 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_184)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse6 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) v_ArrVal_186))))) is different from false [2022-11-26 00:41:20,930 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_186 Int) (v_ArrVal_184 Int)) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_186)))) (let ((.cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ v_ArrVal_186 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (mod .cse0 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (store .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| .cse0))) (store .cse2 .cse3 (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse4 .cse3))))) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))))) 0) (not (<= (+ v_ArrVal_184 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_184)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3)) v_ArrVal_186)) (not (<= (+ (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) v_ArrVal_184))))) is different from false [2022-11-26 00:41:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 1 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-26 00:41:43,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:43,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919342459] [2022-11-26 00:41:43,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:41:43,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829688632] [2022-11-26 00:41:43,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829688632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:43,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024751854] [2022-11-26 00:41:43,544 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:43,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:43,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:43,545 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:43,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,600 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:41:43,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-26 00:41:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,721 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:41:43,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:41:43,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:41:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:41:43,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:43,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:43,977 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-26 00:41:43,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:41:44,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:41:44,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:44,125 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:41:44,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:41:44,217 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:41:44,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-26 00:41:44,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:44,286 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:41:44,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-26 00:41:44,365 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-26 00:41:44,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-26 00:41:44,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:44,694 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-11-26 00:41:44,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 68 [2022-11-26 00:41:45,141 INFO L321 Elim1Store]: treesize reduction 63, result has 38.8 percent of original size [2022-11-26 00:41:45,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2022-11-26 00:41:45,172 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:46,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '940#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:46,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:46,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:41:46,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-11-26 00:41:46,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176296002] [2022-11-26 00:41:46,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:41:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:41:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=12, NotChecked=186, Total=1190 [2022-11-26 00:41:46,282 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:18,271 WARN L233 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 67 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:42:20,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-11-26 00:42:22,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-26 00:42:23,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-26 00:42:25,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-26 00:42:27,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-26 00:43:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:11,437 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2022-11-26 00:43:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:43:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 00:43:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:11,440 INFO L225 Difference]: With dead ends: 81 [2022-11-26 00:43:11,440 INFO L226 Difference]: Without dead ends: 79 [2022-11-26 00:43:11,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 103.8s TimeCoverageRelationStatistics Valid=435, Invalid=3104, Unknown=13, NotChecked=354, Total=3906 [2022-11-26 00:43:11,444 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 119 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 36 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:11,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 107 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 404 Invalid, 2 Unknown, 132 Unchecked, 12.0s Time] [2022-11-26 00:43:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-26 00:43:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 34. [2022-11-26 00:43:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-11-26 00:43:11,462 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2022-11-26 00:43:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:11,463 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-11-26 00:43:11,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-11-26 00:43:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:43:11,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:11,464 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:11,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:11,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:43:11,672 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1784474046, now seen corresponding path program 5 times [2022-11-26 00:43:11,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:11,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902076041] [2022-11-26 00:43:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:11,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:11,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:43:11,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707984704] [2022-11-26 00:43:11,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:43:11,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:11,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:11,724 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:11,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:43:11,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:43:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:43:11,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:43:12,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:43:12,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:12,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902076041] [2022-11-26 00:43:12,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:43:12,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707984704] [2022-11-26 00:43:12,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707984704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:12,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754928260] [2022-11-26 00:43:12,081 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:43:12,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:12,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:12,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:12,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,138 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:43:12,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-26 00:43:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,280 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:43:12,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:43:12,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:43:12,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:43:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:12,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:12,613 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-26 00:43:12,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:43:12,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:12,790 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:43:12,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:43:12,908 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:43:12,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-26 00:43:12,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:12,992 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:43:12,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:43:13,085 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-26 00:43:13,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-26 00:43:13,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:13,343 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-11-26 00:43:13,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2022-11-26 00:43:13,685 INFO L321 Elim1Store]: treesize reduction 63, result has 38.8 percent of original size [2022-11-26 00:43:13,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2022-11-26 00:43:13,771 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:14,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1296#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:14,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:14,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:43:14,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-26 00:43:14,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120386386] [2022-11-26 00:43:14,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:14,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:43:14,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:43:14,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:43:14,524 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:14,779 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-11-26 00:43:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:43:14,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:43:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:14,780 INFO L225 Difference]: With dead ends: 83 [2022-11-26 00:43:14,781 INFO L226 Difference]: Without dead ends: 61 [2022-11-26 00:43:14,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:43:14,782 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:14,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:43:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-26 00:43:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2022-11-26 00:43:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-26 00:43:14,801 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 18 [2022-11-26 00:43:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:14,802 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-26 00:43:14,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-26 00:43:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:43:14,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:14,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:14,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:15,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:15,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:15,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2144309898, now seen corresponding path program 6 times [2022-11-26 00:43:15,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:15,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901387282] [2022-11-26 00:43:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:15,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:15,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:43:15,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622886563] [2022-11-26 00:43:15,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:43:15,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:15,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:15,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:15,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:43:15,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:43:15,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:43:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:43:15,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:43:15,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901387282] [2022-11-26 00:43:15,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:43:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622886563] [2022-11-26 00:43:15,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622886563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [42568053] [2022-11-26 00:43:15,304 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:43:15,305 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:43:15,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:43:15,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:43:15,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:43:15,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,456 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:43:15,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:43:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:43:15,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:43:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:43:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:15,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:15,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:15,820 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-26 00:43:15,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 27 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:43:16,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:43:16,108 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:43:16,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:43:16,203 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:43:16,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-26 00:43:16,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:16,283 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:43:16,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:43:16,387 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-26 00:43:16,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-26 00:43:16,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:16,573 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-11-26 00:43:16,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 73 [2022-11-26 00:43:17,014 INFO L321 Elim1Store]: treesize reduction 63, result has 38.8 percent of original size [2022-11-26 00:43:17,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2022-11-26 00:43:17,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:43:17,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1635#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem17#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:43:17,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:43:17,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:43:17,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-26 00:43:17,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670400819] [2022-11-26 00:43:17,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:17,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:43:17,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:17,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:43:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:43:17,768 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:18,108 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-11-26 00:43:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:43:18,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:43:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:18,109 INFO L225 Difference]: With dead ends: 72 [2022-11-26 00:43:18,110 INFO L226 Difference]: Without dead ends: 54 [2022-11-26 00:43:18,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:43:18,111 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:18,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 39 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:43:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-26 00:43:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-11-26 00:43:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-26 00:43:18,136 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 19 [2022-11-26 00:43:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:18,136 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-26 00:43:18,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-26 00:43:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:43:18,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:18,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:18,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:18,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:18,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash -65478855, now seen corresponding path program 1 times [2022-11-26 00:43:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044622490] [2022-11-26 00:43:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:18,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:43:18,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118354558] [2022-11-26 00:43:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:18,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:18,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:18,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:18,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:43:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:18,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-26 00:43:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:18,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:43:18,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:43:18,571 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 19 treesize of output 18 [2022-11-26 00:43:18,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,606 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 28 treesize of output 30 [2022-11-26 00:43:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,703 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 0 case distinctions, treesize of input 48 treesize of output 38 [2022-11-26 00:43:18,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,770 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 0 case distinctions, treesize of input 50 treesize of output 38 [2022-11-26 00:43:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,890 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 0 case distinctions, treesize of input 53 treesize of output 37 [2022-11-26 00:43:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:18,946 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 0 case distinctions, treesize of input 55 treesize of output 37 [2022-11-26 00:43:19,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:43:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:19,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 85 [2022-11-26 00:43:19,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:43:19,186 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 0 case distinctions, treesize of input 156 treesize of output 84 [2022-11-26 00:43:19,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 41 [2022-11-26 00:43:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:19,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:46,239 WARN L233 SmtUtils]: Spent 19.79s on a formula simplification. DAG size of input: 100 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:45:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:40,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:45:40,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044622490] [2022-11-26 00:45:40,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:45:40,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118354558] [2022-11-26 00:45:40,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118354558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:45:40,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421034186] [2022-11-26 00:45:40,862 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 00:45:40,862 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:45:40,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:45:40,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:45:40,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:45:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,017 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:45:41,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:45:41,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,160 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:45:41,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:45:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:45:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:45:41,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:41,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:41,463 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-26 00:45:41,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:45:41,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:45:41,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:41,599 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:45:41,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:45:41,696 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:45:41,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-26 00:45:41,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:41,770 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:45:41,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-26 00:45:41,872 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-26 00:45:41,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-26 00:45:42,025 INFO L321 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-11-26 00:45:42,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 68 [2022-11-26 00:45:42,315 INFO L321 Elim1Store]: treesize reduction 63, result has 38.8 percent of original size [2022-11-26 00:45:42,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 93 [2022-11-26 00:45:42,431 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:45:42,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2022-11-26 00:45:42,517 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:898) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:772) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:346) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:306) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:116) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 39 more [2022-11-26 00:45:42,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:45:42,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-11-26 00:45:42,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134409667] [2022-11-26 00:45:42,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:45:42,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:45:42,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:45:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1044, Unknown=19, NotChecked=0, Total=1260 [2022-11-26 00:45:42,523 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:45:42,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 134.2s TimeCoverageRelationStatistics Valid=197, Invalid=1044, Unknown=19, NotChecked=0, Total=1260 [2022-11-26 00:45:42,525 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:42,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:45:42,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:42,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:45:42,732 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@20d7d485 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:45:42,734 INFO L158 Benchmark]: Toolchain (without parser) took 364567.63ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 109.6MB in the beginning and 118.6MB in the end (delta: -9.0MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. [2022-11-26 00:45:42,734 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 155.2MB. Free memory is still 99.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:45:42,734 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.62ms. Allocated memory is still 155.2MB. Free memory was 109.1MB in the beginning and 98.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:45:42,734 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.48ms. Allocated memory is still 155.2MB. Free memory was 98.6MB in the beginning and 96.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:45:42,735 INFO L158 Benchmark]: Boogie Preprocessor took 52.39ms. Allocated memory is still 155.2MB. Free memory was 96.5MB in the beginning and 95.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:45:42,735 INFO L158 Benchmark]: RCFGBuilder took 551.38ms. Allocated memory is still 155.2MB. Free memory was 95.4MB in the beginning and 79.3MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-26 00:45:42,735 INFO L158 Benchmark]: TraceAbstraction took 363622.26ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 78.6MB in the beginning and 118.6MB in the end (delta: -40.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:45:42,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 155.2MB. Free memory is still 99.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.62ms. Allocated memory is still 155.2MB. Free memory was 109.1MB in the beginning and 98.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.48ms. Allocated memory is still 155.2MB. Free memory was 98.6MB in the beginning and 96.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.39ms. Allocated memory is still 155.2MB. Free memory was 96.5MB in the beginning and 95.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 551.38ms. Allocated memory is still 155.2MB. Free memory was 95.4MB in the beginning and 79.3MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 363622.26ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 78.6MB in the beginning and 118.6MB in the end (delta: -40.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@20d7d485 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@20d7d485: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/mods.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f15d84a1f588b4a2fae1a1f53311fed1d9572550b31409f886696465cdc8f8ba --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:45:45,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:45:45,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:45:45,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:45:45,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:45:45,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:45:45,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:45:45,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:45:45,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:45:45,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:45:45,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:45:45,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:45:45,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:45:45,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:45:45,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:45:45,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:45:45,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:45:45,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:45:45,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:45:45,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:45:45,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:45:45,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:45:45,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:45:45,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:45:45,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:45:45,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:45:45,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:45:45,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:45:45,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:45:45,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:45:45,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:45:45,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:45:45,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:45:45,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:45:45,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:45:45,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:45:45,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:45:45,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:45:45,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:45:45,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:45:45,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:45:45,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-26 00:45:45,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:45:45,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:45:45,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:45:45,427 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:45:45,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:45:45,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:45:45,428 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:45:45,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:45:45,429 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:45:45,429 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:45:45,431 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:45:45,431 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:45:45,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:45:45,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:45:45,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:45:45,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:45:45,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:45:45,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:45:45,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:45:45,434 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:45:45,434 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:45:45,435 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:45:45,435 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:45:45,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:45:45,435 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:45:45,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:45:45,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:45:45,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:45:45,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:45:45,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:45:45,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:45:45,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:45:45,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:45:45,438 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:45:45,439 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:45:45,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:45:45,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:45:45,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:45:45,440 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f15d84a1f588b4a2fae1a1f53311fed1d9572550b31409f886696465cdc8f8ba [2022-11-26 00:45:45,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:45:45,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:45:45,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:45:45,901 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:45:45,901 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:45:45,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-fpi/mods.c [2022-11-26 00:45:48,918 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:45:49,127 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:45:49,128 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/sv-benchmarks/c/array-fpi/mods.c [2022-11-26 00:45:49,135 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/data/172a802e3/9617619e1ba44238bad1d635b3b5fb30/FLAG087ac7d9b [2022-11-26 00:45:49,156 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/data/172a802e3/9617619e1ba44238bad1d635b3b5fb30 [2022-11-26 00:45:49,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:45:49,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:45:49,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:45:49,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:45:49,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:45:49,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4328690c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49, skipping insertion in model container [2022-11-26 00:45:49,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:45:49,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:45:49,402 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_f81346b2-f1e8-46f0-96f7-78fdc80be761/sv-benchmarks/c/array-fpi/mods.c[587,600] [2022-11-26 00:45:49,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:45:49,454 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:45:49,483 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_f81346b2-f1e8-46f0-96f7-78fdc80be761/sv-benchmarks/c/array-fpi/mods.c[587,600] [2022-11-26 00:45:49,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:45:49,525 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:45:49,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49 WrapperNode [2022-11-26 00:45:49,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:45:49,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:45:49,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:45:49,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:45:49,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,615 INFO L138 Inliner]: procedures = 19, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 103 [2022-11-26 00:45:49,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:45:49,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:45:49,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:45:49,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:45:49,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,680 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:45:49,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:45:49,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:45:49,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:45:49,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (1/1) ... [2022-11-26 00:45:49,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:45:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:45:49,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:45:49,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:45:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:45:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:45:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:45:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-26 00:45:49,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:45:49,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:45:49,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:45:49,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-26 00:45:49,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:45:49,934 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:45:49,937 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:45:50,552 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:45:50,559 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:45:50,559 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-26 00:45:50,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:45:50 BoogieIcfgContainer [2022-11-26 00:45:50,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:45:50,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:45:50,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:45:50,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:45:50,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:45:49" (1/3) ... [2022-11-26 00:45:50,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0617c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:45:50, skipping insertion in model container [2022-11-26 00:45:50,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:45:49" (2/3) ... [2022-11-26 00:45:50,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0617c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:45:50, skipping insertion in model container [2022-11-26 00:45:50,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:45:50" (3/3) ... [2022-11-26 00:45:50,572 INFO L112 eAbstractionObserver]: Analyzing ICFG mods.c [2022-11-26 00:45:50,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:45:50,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:45:50,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:45:50,675 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;@3a380392, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:45:50,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:45:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:45:50,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:50,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:50,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1389277550, now seen corresponding path program 1 times [2022-11-26 00:45:50,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:45:50,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663917851] [2022-11-26 00:45:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:50,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:45:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:45:50,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:45:50,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 00:45:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:50,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-26 00:45:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:50,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:45:50,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:45:50,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663917851] [2022-11-26 00:45:50,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663917851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:45:50,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:45:50,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:45:50,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957957939] [2022-11-26 00:45:50,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:45:50,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:45:50,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:45:50,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:45:50,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:45:50,963 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:50,993 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2022-11-26 00:45:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:45:50,996 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:45:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:51,006 INFO L225 Difference]: With dead ends: 50 [2022-11-26 00:45:51,007 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:45:51,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:45:51,014 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:51,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:45:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:45:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-26 00:45:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-26 00:45:51,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2022-11-26 00:45:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:51,056 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-26 00:45:51,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:51,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-26 00:45:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:45:51,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:51,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:51,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:51,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:45:51,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash 796930410, now seen corresponding path program 1 times [2022-11-26 00:45:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:45:51,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343718435] [2022-11-26 00:45:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:51,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:45:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:45:51,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:45:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 00:45:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:45:51,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:45:51,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:45:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:51,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:45:51,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:45:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343718435] [2022-11-26 00:45:51,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343718435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:45:51,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:45:51,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:45:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902936669] [2022-11-26 00:45:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:45:51,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:45:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:45:51,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:45:51,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:45:51,631 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:45:52,453 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-11-26 00:45:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:45:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:45:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:45:52,467 INFO L225 Difference]: With dead ends: 53 [2022-11-26 00:45:52,467 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 00:45:52,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:45:52,469 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:45:52,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:45:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 00:45:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2022-11-26 00:45:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-26 00:45:52,487 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2022-11-26 00:45:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:45:52,488 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-26 00:45:52,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:45:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-26 00:45:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:45:52,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:45:52,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:45:52,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:45:52,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:45:52,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:45:52,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:45:52,691 INFO L85 PathProgramCache]: Analyzing trace with hash 495241442, now seen corresponding path program 1 times [2022-11-26 00:45:52,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:45:52,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137610272] [2022-11-26 00:45:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:45:52,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:45:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:45:52,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:45:52,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-26 00:46:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:46:24,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:46:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:24,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 18 [2022-11-26 00:46:24,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:46:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:24,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:46:24,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:24,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:24,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 59 [2022-11-26 00:46:25,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:25,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 79 [2022-11-26 00:46:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:25,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:29,625 INFO L321 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-11-26 00:46:29,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 157 treesize of output 117 [2022-11-26 00:46:58,523 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:47:34,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:47:34,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137610272] [2022-11-26 00:47:34,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 10231 column 7: push canceled [2022-11-26 00:47:34,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1512480039] [2022-11-26 00:47:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:34,212 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:47:34,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:47:34,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:47:34,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-26 00:47:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:47:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:35,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Function ULTIMATE.start_main_~i~0#1 is already defined. [2022-11-26 00:47:35,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524887373] [2022-11-26 00:47:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:35,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:35,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:35,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:47:35,804 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6925add3 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:116) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:135) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:90) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:320) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1296) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:387) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:47:35,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:47:35,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-26 00:47:35,806 ERROR L170 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2022-11-26 00:47:35,806 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2022-11-26 00:47:35,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:47:35,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:36,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:36,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:36,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81346b2-f1e8-46f0-96f7-78fdc80be761/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:47:36,442 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-26 00:47:36,445 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:47:36,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:47:36 BoogieIcfgContainer [2022-11-26 00:47:36,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:47:36,461 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:47:36,461 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:47:36,461 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:47:36,462 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:45:50" (3/4) ... [2022-11-26 00:47:36,465 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-26 00:47:36,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:47:36,467 INFO L158 Benchmark]: Toolchain (without parser) took 107302.73ms. Allocated memory was 58.7MB in the beginning and 96.5MB in the end (delta: 37.7MB). Free memory was 28.1MB in the beginning and 38.0MB in the end (delta: -9.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-26 00:47:36,467 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 58.7MB. Free memory was 36.9MB in the beginning and 36.8MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:47:36,468 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.01ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 27.8MB in the beginning and 53.0MB in the end (delta: -25.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2022-11-26 00:47:36,469 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.85ms. Allocated memory is still 79.7MB. Free memory was 53.0MB in the beginning and 51.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:47:36,469 INFO L158 Benchmark]: Boogie Preprocessor took 74.38ms. Allocated memory is still 79.7MB. Free memory was 51.3MB in the beginning and 49.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:47:36,470 INFO L158 Benchmark]: RCFGBuilder took 868.18ms. Allocated memory is still 79.7MB. Free memory was 49.6MB in the beginning and 56.2MB in the end (delta: -6.6MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2022-11-26 00:47:36,470 INFO L158 Benchmark]: TraceAbstraction took 105896.44ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 55.6MB in the beginning and 38.0MB in the end (delta: 17.6MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2022-11-26 00:47:36,471 INFO L158 Benchmark]: Witness Printer took 5.02ms. Allocated memory is still 96.5MB. Free memory is still 38.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:47:36,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 58.7MB. Free memory was 36.9MB in the beginning and 36.8MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.01ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 27.8MB in the beginning and 53.0MB in the end (delta: -25.2MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.85ms. Allocated memory is still 79.7MB. Free memory was 53.0MB in the beginning and 51.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.38ms. Allocated memory is still 79.7MB. Free memory was 51.3MB in the beginning and 49.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 868.18ms. Allocated memory is still 79.7MB. Free memory was 49.6MB in the beginning and 56.2MB in the end (delta: -6.6MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * TraceAbstraction took 105896.44ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 55.6MB in the beginning and 38.0MB in the end (delta: 17.6MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. * Witness Printer took 5.02ms. Allocated memory is still 96.5MB. Free memory is still 38.0MB. There was no memory consumed. 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 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] long long *a = malloc(sizeof(long long)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i