./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/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_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/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_15eb4c78-8136-4c92-8473-a75db83bc8b5/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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- 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 00:38:50,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:38:50,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:38:50,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:38:50,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:38:50,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:38:50,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:38:50,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:38:50,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:38:50,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:38:50,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:38:50,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:38:50,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:38:50,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:38:50,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:38:50,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:38:50,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:38:50,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:38:50,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:38:50,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:38:50,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:38:50,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:38:50,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:38:50,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:38:50,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:38:50,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:38:50,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:38:50,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:38:50,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:38:50,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:38:50,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:38:50,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:38:50,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:38:50,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:38:50,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:38:50,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:38:50,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:38:50,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:38:50,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:38:50,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:38:50,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:38:50,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:38:50,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:38:50,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:38:50,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:38:50,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:38:50,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:38:50,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:38:50,629 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:38:50,629 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:38:50,630 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:38:50,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:38:50,630 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:38:50,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:38:50,631 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:38:50,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:38:50,631 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:38:50,632 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:38:50,632 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:38:50,632 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:38:50,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:38:50,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:38:50,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:38:50,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:38:50,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:38:50,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:38:50,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:38:50,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:38:50,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:38:50,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:38:50,636 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:38:50,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:38:50,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:38:50,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:38:50,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:38:50,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:38:50,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:38:50,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:38:50,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:38:50,639 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:38:50,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:38:50,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:38:50,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:38:50,640 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_15eb4c78-8136-4c92-8473-a75db83bc8b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-11-26 00:38:50,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:38:50,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:38:50,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:38:50,955 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:38:50,955 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:38:50,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loops/vogal-1.i [2022-11-26 00:38:54,049 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:38:54,237 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:38:54,238 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/sv-benchmarks/c/loops/vogal-1.i [2022-11-26 00:38:54,245 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/data/ebcbe8d84/3b675df04169443eb73d712690f4ce3b/FLAGba568754b [2022-11-26 00:38:54,260 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/data/ebcbe8d84/3b675df04169443eb73d712690f4ce3b [2022-11-26 00:38:54,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:38:54,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:38:54,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:38:54,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:38:54,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:38:54,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71593a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54, skipping insertion in model container [2022-11-26 00:38:54,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:38:54,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:38:54,452 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_15eb4c78-8136-4c92-8473-a75db83bc8b5/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-26 00:38:54,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:38:54,489 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:38:54,502 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_15eb4c78-8136-4c92-8473-a75db83bc8b5/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-26 00:38:54,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:38:54,533 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:38:54,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54 WrapperNode [2022-11-26 00:38:54,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:38:54,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:38:54,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:38:54,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:38:54,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,570 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-11-26 00:38:54,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:38:54,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:38:54,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:38:54,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:38:54,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,596 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:38:54,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:38:54,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:38:54,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:38:54,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (1/1) ... [2022-11-26 00:38:54,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:38:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:54,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:38:54,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:38:54,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:38:54,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:38:54,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:38:54,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:38:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:38:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:38:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:38:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:38:54,757 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:38:54,759 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:38:55,058 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:38:55,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:38:55,166 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 00:38:55,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:38:55 BoogieIcfgContainer [2022-11-26 00:38:55,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:38:55,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:38:55,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:38:55,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:38:55,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:38:54" (1/3) ... [2022-11-26 00:38:55,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752ee5f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:38:55, skipping insertion in model container [2022-11-26 00:38:55,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:54" (2/3) ... [2022-11-26 00:38:55,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752ee5f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:38:55, skipping insertion in model container [2022-11-26 00:38:55,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:38:55" (3/3) ... [2022-11-26 00:38:55,178 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-11-26 00:38:55,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:38:55,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:38:55,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:38:55,283 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;@1e7a639f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:38:55,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:38:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 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 00:38:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:38:55,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:55,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:55,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash 682810099, now seen corresponding path program 1 times [2022-11-26 00:38:55,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:55,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319432771] [2022-11-26 00:38:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:55,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:55,577 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 00:38:55,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:55,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319432771] [2022-11-26 00:38:55,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319432771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:55,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:55,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:38:55,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494304541] [2022-11-26 00:38:55,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:55,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:38:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:38:55,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:38:55,618 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 00:38:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:55,658 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-26 00:38:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:38:55,661 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 00:38:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:55,669 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:38:55,669 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:38:55,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 00:38:55,676 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:55,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:38:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:38:55,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-26 00:38:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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 00:38:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-26 00:38:55,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 10 [2022-11-26 00:38:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:55,709 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-26 00:38:55,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 00:38:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-26 00:38:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:38:55,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:55,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:55,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:38:55,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash -545169927, now seen corresponding path program 1 times [2022-11-26 00:38:55,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:55,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300589250] [2022-11-26 00:38:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:55,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:55,935 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 00:38:55,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300589250] [2022-11-26 00:38:55,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300589250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:55,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:55,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:38:55,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372691260] [2022-11-26 00:38:55,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:55,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:55,940 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:55,985 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2022-11-26 00:38:55,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:55,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:38:55,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:55,987 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:38:55,987 INFO L226 Difference]: Without dead ends: 25 [2022-11-26 00:38:55,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:55,989 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:55,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:38:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-26 00:38:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2022-11-26 00:38:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-26 00:38:55,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 12 [2022-11-26 00:38:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:55,996 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-26 00:38:55,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-26 00:38:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:38:55,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:55,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:55,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:38:55,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash -268015701, now seen corresponding path program 1 times [2022-11-26 00:38:55,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:55,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363667952] [2022-11-26 00:38:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:56,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:56,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363667952] [2022-11-26 00:38:56,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363667952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:56,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715685889] [2022-11-26 00:38:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:56,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:56,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:56,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:56,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:38:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:38:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:56,374 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 00:38:56,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:56,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715685889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:56,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:38:56,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-11-26 00:38:56,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126225649] [2022-11-26 00:38:56,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:56,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:56,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:38:56,386 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:56,475 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-26 00:38:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:38:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:56,477 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:38:56,477 INFO L226 Difference]: Without dead ends: 28 [2022-11-26 00:38:56,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:38:56,479 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:56,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:38:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-26 00:38:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-11-26 00:38:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 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 00:38:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-11-26 00:38:56,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 13 [2022-11-26 00:38:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:56,486 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-11-26 00:38:56,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-11-26 00:38:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:38:56,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:56,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:56,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:56,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:56,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 334371122, now seen corresponding path program 1 times [2022-11-26 00:38:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:56,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509004106] [2022-11-26 00:38:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:56,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:38:56,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:56,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509004106] [2022-11-26 00:38:56,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509004106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:56,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095475629] [2022-11-26 00:38:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:56,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:56,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:56,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:56,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:38:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:56,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:38:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:38:57,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:57,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095475629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:57,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:38:57,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-11-26 00:38:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111483023] [2022-11-26 00:38:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:57,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:38:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:38:57,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:38:57,003 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 00:38:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:57,062 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-11-26 00:38:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:38:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 00:38:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:57,065 INFO L225 Difference]: With dead ends: 53 [2022-11-26 00:38:57,065 INFO L226 Difference]: Without dead ends: 39 [2022-11-26 00:38:57,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:38:57,068 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:57,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:38:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-26 00:38:57,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2022-11-26 00:38:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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 00:38:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-11-26 00:38:57,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2022-11-26 00:38:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:57,087 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-11-26 00:38:57,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 00:38:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-11-26 00:38:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:38:57,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:57,089 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:57,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:38:57,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:57,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2008657713, now seen corresponding path program 1 times [2022-11-26 00:38:57,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:57,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345219311] [2022-11-26 00:38:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:57,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:38:57,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:57,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345219311] [2022-11-26 00:38:57,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345219311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:57,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281791658] [2022-11-26 00:38:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:57,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:57,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:57,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:57,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:38:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:38:57,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:57,526 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 00:38:57,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-26 00:38:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:38:57,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:38:57,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281791658] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:57,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:38:57,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 12 [2022-11-26 00:38:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107610824] [2022-11-26 00:38:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:57,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:38:57,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:38:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:38:57,780 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 00:38:57,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:57,953 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-11-26 00:38:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:38:57,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 17 [2022-11-26 00:38:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:57,954 INFO L225 Difference]: With dead ends: 37 [2022-11-26 00:38:57,954 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:38:57,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:38:57,955 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:57,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:38:57,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:38:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-26 00:38:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-11-26 00:38:57,960 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 17 [2022-11-26 00:38:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:57,960 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-11-26 00:38:57,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 00:38:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-11-26 00:38:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:38:57,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:57,961 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:57,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:58,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:58,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash -301318537, now seen corresponding path program 1 times [2022-11-26 00:38:58,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:58,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28500307] [2022-11-26 00:38:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:38:58,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28500307] [2022-11-26 00:38:58,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28500307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:58,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566586459] [2022-11-26 00:38:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:58,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:58,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:58,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:58,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:38:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:38:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:58,334 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 00:38:58,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-26 00:38:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:38:58,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:38:58,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566586459] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:58,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:38:58,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 12 [2022-11-26 00:38:58,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567973412] [2022-11-26 00:38:58,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:58,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:38:58,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:58,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:38:58,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:38:58,584 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:58,749 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2022-11-26 00:38:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:38:58,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:38:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:58,751 INFO L225 Difference]: With dead ends: 36 [2022-11-26 00:38:58,751 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:38:58,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:38:58,752 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:58,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:38:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:38:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-11-26 00:38:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-11-26 00:38:58,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 18 [2022-11-26 00:38:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:58,758 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-11-26 00:38:58,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-11-26 00:38:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:38:58,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:58,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:58,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:58,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:38:58,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:38:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash -240200662, now seen corresponding path program 1 times [2022-11-26 00:38:58,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:58,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523399837] [2022-11-26 00:38:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:58,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:38:59,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:59,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523399837] [2022-11-26 00:38:59,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523399837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:59,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247545747] [2022-11-26 00:38:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:59,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:59,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:59,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:59,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:38:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:38:59,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:38:59,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:38:59,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247545747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:59,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321678877] [2022-11-26 00:38:59,221 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:38:59,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:59,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:38:59,237 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:38:59,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:38:59,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,358 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:38:59,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:38:59,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 00:38:59,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:38:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:38:59,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:38:59,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:59,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:38:59,908 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:38:59,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:39:00,155 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 32 treesize of output 28 [2022-11-26 00:39:00,295 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:00,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1321678877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:39:00,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:00,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [3, 3, 5] total 17 [2022-11-26 00:39:00,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669603032] [2022-11-26 00:39:00,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:00,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:39:00,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:39:00,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:39:00,798 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 00:39:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:00,923 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-26 00:39:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:39:00,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 19 [2022-11-26 00:39:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:00,925 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:39:00,925 INFO L226 Difference]: Without dead ends: 27 [2022-11-26 00:39:00,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:39:00,926 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:00,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 20 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-26 00:39:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-26 00:39:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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 00:39:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-26 00:39:00,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 19 [2022-11-26 00:39:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:00,937 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-26 00:39:00,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 00:39:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-26 00:39:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:39:00,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:00,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:00,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:01,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:01,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2018430215, now seen corresponding path program 1 times [2022-11-26 00:39:01,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:01,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332495023] [2022-11-26 00:39:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:01,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:39:01,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332495023] [2022-11-26 00:39:01,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332495023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463587499] [2022-11-26 00:39:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:01,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:01,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:01,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:39:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:01,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:39:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:39:01,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:39:01,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463587499] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:01,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:39:01,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2022-11-26 00:39:01,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942688225] [2022-11-26 00:39:01,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:39:01,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:39:01,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:39:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:39:01,325 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 00:39:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:01,355 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2022-11-26 00:39:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:39:01,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 21 [2022-11-26 00:39:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:01,357 INFO L225 Difference]: With dead ends: 40 [2022-11-26 00:39:01,357 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:39:01,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:39:01,358 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:01,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:39:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:39:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-26 00:39:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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 00:39:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-26 00:39:01,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 21 [2022-11-26 00:39:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:01,366 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-26 00:39:01,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 00:39:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-26 00:39:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:39:01,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:01,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:01,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:01,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:39:01,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:01,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1616256613, now seen corresponding path program 1 times [2022-11-26 00:39:01,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:01,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878308785] [2022-11-26 00:39:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:01,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:39:01,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:01,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878308785] [2022-11-26 00:39:01,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878308785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:01,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846863367] [2022-11-26 00:39:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:01,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:01,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:01,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:01,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:39:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:39:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:01,837 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 00:39:02,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:39:02,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2022-11-26 00:39:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:39:02,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:39:04,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846863367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:04,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127850823] [2022-11-26 00:39:04,165 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:39:04,165 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:04,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:04,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:04,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,234 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:39:04,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:39:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 00:39:04,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:39:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:04,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:04,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:04,604 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:39:04,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:39:04,806 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 32 treesize of output 28 [2022-11-26 00:39:05,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:06,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1471#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:06,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:06,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:06,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 10, 9] total 20 [2022-11-26 00:39:06,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12562667] [2022-11-26 00:39:06,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:39:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:06,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:39:06,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:39:06,354 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:10,122 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-11-26 00:39:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:39:10,122 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-26 00:39:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:10,123 INFO L225 Difference]: With dead ends: 88 [2022-11-26 00:39:10,123 INFO L226 Difference]: Without dead ends: 66 [2022-11-26 00:39:10,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:39:10,125 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:10,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 112 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:39:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-26 00:39:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 31. [2022-11-26 00:39:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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 00:39:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-26 00:39:10,143 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2022-11-26 00:39:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:10,144 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-26 00:39:10,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-26 00:39:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:39:10,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:10,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:10,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1638150324, now seen corresponding path program 2 times [2022-11-26 00:39:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:10,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901416131] [2022-11-26 00:39:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:10,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:39:10,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:10,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901416131] [2022-11-26 00:39:10,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901416131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:10,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152153564] [2022-11-26 00:39:10,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:39:10,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:10,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:10,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:10,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:39:10,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:39:10,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:39:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:39:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:39:10,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:39:10,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152153564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:10,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093149606] [2022-11-26 00:39:10,695 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:39:10,695 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:10,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:10,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:10,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,781 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:39:10,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 00:39:10,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,842 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:39:10,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:39:10,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:10,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:39:11,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:11,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:11,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:11,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:11,169 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:39:11,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:39:11,334 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 32 treesize of output 28 [2022-11-26 00:39:11,853 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:12,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1840#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:12,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:12,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:12,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-26 00:39:12,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671305404] [2022-11-26 00:39:12,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:12,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:39:12,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:39:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:39:12,619 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 00:39:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:12,832 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2022-11-26 00:39:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:39:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) Word has length 24 [2022-11-26 00:39:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:12,834 INFO L225 Difference]: With dead ends: 110 [2022-11-26 00:39:12,834 INFO L226 Difference]: Without dead ends: 83 [2022-11-26 00:39:12,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:39:12,835 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:12,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 74 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-26 00:39:12,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 34. [2022-11-26 00:39:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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 00:39:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-26 00:39:12,854 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2022-11-26 00:39:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:12,854 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-26 00:39:12,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 00:39:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-26 00:39:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:39:12,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:12,855 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:12,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:13,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:39:13,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:13,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2125385662, now seen corresponding path program 3 times [2022-11-26 00:39:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:13,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199199152] [2022-11-26 00:39:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:13,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:39:13,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199199152] [2022-11-26 00:39:13,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199199152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:13,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005537179] [2022-11-26 00:39:13,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:39:13,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:13,202 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:13,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:39:13,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:39:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:39:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:39:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:39:13,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:39:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005537179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763316086] [2022-11-26 00:39:13,331 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:39:13,331 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:13,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:13,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:13,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:13,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,402 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:39:13,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:39:13,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 00:39:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2022-11-26 00:39:13,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:13,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:13,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:13,774 INFO L321 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-11-26 00:39:13,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 71 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 42 case distinctions, treesize of input 501 treesize of output 442 [2022-11-26 00:39:13,884 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 32 treesize of output 28 [2022-11-26 00:39:14,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:15,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2251#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:15,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:15,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:15,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-11-26 00:39:15,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703505881] [2022-11-26 00:39:15,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:15,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:39:15,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:15,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:39:15,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:39:15,481 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 00:39:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:15,586 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-11-26 00:39:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:39:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-26 00:39:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:15,588 INFO L225 Difference]: With dead ends: 53 [2022-11-26 00:39:15,588 INFO L226 Difference]: Without dead ends: 35 [2022-11-26 00:39:15,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:39:15,589 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:15,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:39:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-26 00:39:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-11-26 00:39:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 00:39:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-26 00:39:15,616 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2022-11-26 00:39:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:15,616 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-26 00:39:15,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 00:39:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-26 00:39:15,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:39:15,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:15,623 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:15,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:15,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:39:15,828 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:39:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2006983306, now seen corresponding path program 4 times [2022-11-26 00:39:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:39:15,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6985431] [2022-11-26 00:39:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:15,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:39:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:39:21,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:39:21,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6985431] [2022-11-26 00:39:21,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6985431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:39:21,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521905194] [2022-11-26 00:39:21,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:39:21,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:21,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:21,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:21,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:39:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-26 00:39:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:23,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:39:23,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 88 [2022-11-26 00:39:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:39:23,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:26,315 INFO L321 Elim1Store]: treesize reduction 157, result has 42.5 percent of original size [2022-11-26 00:39:26,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 505 treesize of output 368 [2022-11-26 00:39:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:39:30,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521905194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:30,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995353474] [2022-11-26 00:39:30,689 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:39:30,690 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:39:30,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:39:30,690 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:39:30,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,767 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:39:30,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 00:39:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,820 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:39:30,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:39:30,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:30,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:39:31,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:31,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:31,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:39:31,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:39:31,163 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:39:31,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:39:31,308 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 32 treesize of output 28 [2022-11-26 00:39:31,710 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:39:33,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2609#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:39:33,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:39:33,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:39:33,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 12] total 42 [2022-11-26 00:39:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494710344] [2022-11-26 00:39:33,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:33,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:39:33,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:39:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:39:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:39:33,104 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 42 states have internal predecessors, (71), 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 00:40:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:17,733 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-11-26 00:40:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-26 00:40:17,734 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 42 states have internal predecessors, (71), 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 28 [2022-11-26 00:40:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:17,735 INFO L225 Difference]: With dead ends: 164 [2022-11-26 00:40:17,735 INFO L226 Difference]: Without dead ends: 135 [2022-11-26 00:40:17,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5267 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=1969, Invalid=14543, Unknown=0, NotChecked=0, Total=16512 [2022-11-26 00:40:17,740 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 529 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:17,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 219 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:40:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-26 00:40:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 51. [2022-11-26 00:40:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-26 00:40:17,777 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 28 [2022-11-26 00:40:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:17,777 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-26 00:40:17,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 42 states have internal predecessors, (71), 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 00:40:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-26 00:40:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:40:17,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:17,778 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:17,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:40:17,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:40:17,983 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:17,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:17,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1785196442, now seen corresponding path program 5 times [2022-11-26 00:40:17,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:17,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950703455] [2022-11-26 00:40:17,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:17,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:40:19,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:19,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950703455] [2022-11-26 00:40:19,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950703455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:40:19,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692592022] [2022-11-26 00:40:19,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:40:19,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:19,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:19,136 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:19,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:40:19,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:40:19,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:40:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:19,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-26 00:40:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:40:19,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:19,685 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-26 00:40:19,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2022-11-26 00:40:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:40:19,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692592022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:19,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039193053] [2022-11-26 00:40:19,743 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:40:19,743 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:40:19,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:40:19,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:40:19,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:40:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,799 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:40:19,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 00:40:19,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,852 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:40:19,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:40:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:40:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:20,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:20,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:20,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:20,139 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:40:20,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:40:20,284 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 32 treesize of output 28 [2022-11-26 00:40:20,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:40:21,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3338#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:40:21,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:40:21,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:40:21,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 23 [2022-11-26 00:40:21,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824997033] [2022-11-26 00:40:21,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:21,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:40:21,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:40:21,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:40:21,901 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 00:40:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:22,558 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-26 00:40:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:40:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 33 [2022-11-26 00:40:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:22,559 INFO L225 Difference]: With dead ends: 75 [2022-11-26 00:40:22,559 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:40:22,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:40:22,561 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:22,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 102 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:40:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:40:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-26 00:40:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 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 00:40:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-11-26 00:40:22,591 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2022-11-26 00:40:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:22,591 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-11-26 00:40:22,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 00:40:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-11-26 00:40:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:40:22,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:22,592 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:22,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:40:22,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:22,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2112038823, now seen corresponding path program 6 times [2022-11-26 00:40:22,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:22,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011379063] [2022-11-26 00:40:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:22,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:40:23,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011379063] [2022-11-26 00:40:23,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011379063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:40:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819305015] [2022-11-26 00:40:23,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:40:23,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:23,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:23,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:23,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:40:23,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:40:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:23,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 00:40:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:23,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-26 00:40:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:40:23,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:24,184 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-26 00:40:24,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-11-26 00:40:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:40:24,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819305015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:24,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233925321] [2022-11-26 00:40:24,228 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:40:24,228 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:40:24,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:40:24,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:40:24,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:40:24,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,285 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:40:24,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 00:40:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,340 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:40:24,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:40:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:40:24,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:24,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:24,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:24,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:24,628 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:40:24,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:40:24,752 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 32 treesize of output 28 [2022-11-26 00:40:25,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:40:26,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3784#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:40:26,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:40:26,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:40:26,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 23 [2022-11-26 00:40:26,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928896022] [2022-11-26 00:40:26,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:26,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:40:26,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:40:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:40:26,307 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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 00:40:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:26,743 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-11-26 00:40:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:40:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-26 00:40:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:26,745 INFO L225 Difference]: With dead ends: 57 [2022-11-26 00:40:26,745 INFO L226 Difference]: Without dead ends: 53 [2022-11-26 00:40:26,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:40:26,746 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:26,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 98 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:40:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-26 00:40:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2022-11-26 00:40:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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 00:40:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-26 00:40:26,782 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2022-11-26 00:40:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:26,783 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-26 00:40:26,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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 00:40:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-26 00:40:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:40:26,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:26,784 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:26,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:40:26,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:40:26,989 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:26,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:26,990 INFO L85 PathProgramCache]: Analyzing trace with hash -505912715, now seen corresponding path program 7 times [2022-11-26 00:40:26,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:26,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461345564] [2022-11-26 00:40:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:26,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 00:40:27,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:27,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461345564] [2022-11-26 00:40:27,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461345564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:40:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641141729] [2022-11-26 00:40:27,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:40:27,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:27,212 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:27,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:40:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:40:27,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:40:27,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:40:27,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641141729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:27,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545562829] [2022-11-26 00:40:27,662 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:40:27,662 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:40:27,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:40:27,663 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:40:27,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:40:27,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,717 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:40:27,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 00:40:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,774 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:40:27,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:40:27,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:40:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:27,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:27,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:40:27,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:40:28,066 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:40:28,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:40:28,221 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 32 treesize of output 28 [2022-11-26 00:40:28,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:40:29,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4189#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:40:29,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:40:29,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:40:29,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 22 [2022-11-26 00:40:29,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658108709] [2022-11-26 00:40:29,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:29,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:40:29,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:29,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:40:29,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:40:29,798 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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 00:40:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:35,443 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2022-11-26 00:40:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-26 00:40:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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 35 [2022-11-26 00:40:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:35,448 INFO L225 Difference]: With dead ends: 191 [2022-11-26 00:40:35,449 INFO L226 Difference]: Without dead ends: 175 [2022-11-26 00:40:35,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1018, Invalid=6814, Unknown=0, NotChecked=0, Total=7832 [2022-11-26 00:40:35,451 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 449 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:35,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 120 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:40:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-26 00:40:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 49. [2022-11-26 00:40:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 00:40:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-26 00:40:35,505 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 35 [2022-11-26 00:40:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:35,505 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-26 00:40:35,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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 00:40:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-26 00:40:35,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:40:35,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:35,506 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:35,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:40:35,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:40:35,712 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:35,713 INFO L85 PathProgramCache]: Analyzing trace with hash 151018505, now seen corresponding path program 8 times [2022-11-26 00:40:35,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:35,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380730163] [2022-11-26 00:40:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:35,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:53,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:53,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380730163] [2022-11-26 00:40:53,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380730163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:40:53,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141712744] [2022-11-26 00:40:53,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:40:53,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:53,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:53,863 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:53,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:40:54,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:40:54,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:54,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-26 00:40:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:54,135 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 00:40:54,224 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 23 treesize of output 23 [2022-11-26 00:40:54,315 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 23 treesize of output 23 [2022-11-26 00:40:54,398 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 23 treesize of output 23 [2022-11-26 00:40:54,433 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 23 treesize of output 23 [2022-11-26 00:40:54,453 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 23 treesize of output 23 [2022-11-26 00:41:00,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:00,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:00,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:00,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 529 treesize of output 237 [2022-11-26 00:41:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:41:01,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:41:46,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141712744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060760134] [2022-11-26 00:41:46,507 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:41:46,507 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:46,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:46,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:46,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:46,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,560 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:41:46,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 00:41:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,613 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:41:46,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:41:46,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:41:46,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:46,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:46,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:46,888 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:41:46,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:41:47,017 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 32 treesize of output 28 [2022-11-26 00:41:47,414 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:50,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5017#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:50,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:50,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:50,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 20] total 73 [2022-11-26 00:41:50,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52239785] [2022-11-26 00:41:50,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:50,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-26 00:41:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-26 00:41:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=6791, Unknown=0, NotChecked=0, Total=7310 [2022-11-26 00:41:50,183 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 73 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 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 00:42:10,756 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 402 DAG size of output: 245 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:42:17,069 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 406 DAG size of output: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:42:27,299 WARN L233 SmtUtils]: Spent 7.39s on a formula simplification. DAG size of input: 446 DAG size of output: 191 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:42:42,475 WARN L233 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 406 DAG size of output: 261 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:42:49,550 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 434 DAG size of output: 176 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:43:20,208 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 432 DAG size of output: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:43:27,443 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 376 DAG size of output: 192 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:43:48,708 WARN L233 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 444 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:43:54,680 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 358 DAG size of output: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:44:15,062 WARN L233 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 449 DAG size of output: 207 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:44:53,619 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 428 DAG size of output: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:45:07,014 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 424 DAG size of output: 274 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:45:27,290 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 427 DAG size of output: 202 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:45:34,751 WARN L233 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 396 DAG size of output: 184 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:45:51,939 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 432 DAG size of output: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:46:26,458 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 402 DAG size of output: 269 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:46:32,427 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 382 DAG size of output: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:46:46,184 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 535 DAG size of output: 169 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:46:56,160 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 382 DAG size of output: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:47:24,876 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 399 DAG size of output: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:47:44,723 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 377 DAG size of output: 195 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:47:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:44,748 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2022-11-26 00:47:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-26 00:47:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 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 39 [2022-11-26 00:47:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:44,750 INFO L225 Difference]: With dead ends: 198 [2022-11-26 00:47:44,750 INFO L226 Difference]: Without dead ends: 174 [2022-11-26 00:47:44,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10763 ImplicationChecksByTransitivity, 368.0s TimeCoverageRelationStatistics Valid=2653, Invalid=29567, Unknown=0, NotChecked=0, Total=32220 [2022-11-26 00:47:44,758 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 866 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:44,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 466 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-26 00:47:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-26 00:47:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 73. [2022-11-26 00:47:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 72 states have internal predecessors, (82), 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 00:47:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-11-26 00:47:44,861 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 39 [2022-11-26 00:47:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:44,861 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-11-26 00:47:44,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 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 00:47:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-11-26 00:47:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:47:44,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:44,862 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:44,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:45,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:47:45,063 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash 320741985, now seen corresponding path program 9 times [2022-11-26 00:47:45,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:45,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846068979] [2022-11-26 00:47:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:45,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 00:47:45,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:45,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846068979] [2022-11-26 00:47:45,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846068979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:45,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70153980] [2022-11-26 00:47:45,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:47:45,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:45,424 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:45,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:47:45,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:47:45,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:47:45,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-26 00:47:45,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:46,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-26 00:47:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:47:46,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:46,423 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-26 00:47:46,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-11-26 00:47:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:47:46,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70153980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106998793] [2022-11-26 00:47:46,539 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:47:46,539 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:46,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:46,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:46,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,596 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:47:46,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 00:47:46,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,653 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:47:46,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:47:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2022-11-26 00:47:46,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:46,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:47,003 INFO L321 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-11-26 00:47:47,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 71 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 42 case distinctions, treesize of input 501 treesize of output 442 [2022-11-26 00:47:47,082 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 32 treesize of output 28 [2022-11-26 00:47:47,462 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:48,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5958#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:47:48,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:48,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:47:48,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 11] total 34 [2022-11-26 00:47:48,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008691538] [2022-11-26 00:47:48,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:48,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:47:48,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:47:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1972, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:47:48,868 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:53,537 INFO L93 Difference]: Finished difference Result 296 states and 320 transitions. [2022-11-26 00:47:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-26 00:47:53,537 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-26 00:47:53,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:53,539 INFO L225 Difference]: With dead ends: 296 [2022-11-26 00:47:53,539 INFO L226 Difference]: Without dead ends: 275 [2022-11-26 00:47:53,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=949, Invalid=11041, Unknown=0, NotChecked=0, Total=11990 [2022-11-26 00:47:53,540 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 451 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 3310 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 3375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:53,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 900 Invalid, 3375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3310 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:47:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-26 00:47:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 70. [2022-11-26 00:47:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 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 00:47:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-11-26 00:47:53,632 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 43 [2022-11-26 00:47:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:53,632 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-11-26 00:47:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-11-26 00:47:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:47:53,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:53,633 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:53,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:53,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:53,839 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1262392551, now seen corresponding path program 10 times [2022-11-26 00:47:53,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:53,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569582444] [2022-11-26 00:47:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:53,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:47:55,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569582444] [2022-11-26 00:47:55,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569582444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855926322] [2022-11-26 00:47:55,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:47:55,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:55,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:55,428 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:55,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:47:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 00:47:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:55,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-26 00:47:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:47:55,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:56,065 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-26 00:47:56,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2022-11-26 00:47:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:47:56,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855926322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:56,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94496045] [2022-11-26 00:47:56,163 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:47:56,163 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:56,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:56,163 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:56,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,212 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:47:56,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 00:47:56,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,274 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:47:56,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 00:47:56,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-11-26 00:47:56,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:56,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:56,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:56,547 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-11-26 00:47:56,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 43 case distinctions, treesize of input 452 treesize of output 437 [2022-11-26 00:47:56,690 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 32 treesize of output 28 [2022-11-26 00:47:57,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:58,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7026#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#input_string~0#1.base|) (+ |ULTIMATE.start_main_~#input_string~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~#input_string~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#vogal_array~0#1.base|) (= |ULTIMATE.start_main_~#vogal_array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#input_string~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:47:58,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:58,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:47:58,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-11-26 00:47:58,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624596647] [2022-11-26 00:47:58,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:58,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:47:58,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:47:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:47:58,480 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 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 00:47:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:59,577 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-11-26 00:47:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:47:59,577 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 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 44 [2022-11-26 00:47:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:59,578 INFO L225 Difference]: With dead ends: 106 [2022-11-26 00:47:59,578 INFO L226 Difference]: Without dead ends: 75 [2022-11-26 00:47:59,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=336, Invalid=2970, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:47:59,579 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 124 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:59,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 151 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:47:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-26 00:47:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-11-26 00:47:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 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 00:47:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-11-26 00:47:59,660 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 44 [2022-11-26 00:47:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:59,660 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-11-26 00:47:59,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 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 00:47:59,661 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-11-26 00:47:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:47:59,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:59,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:59,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:59,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15eb4c78-8136-4c92-8473-a75db83bc8b5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:47:59,862 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1868939880, now seen corresponding path program 11 times [2022-11-26 00:47:59,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:59,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286745855] [2022-11-26 00:47:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:59,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat