./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-2329fc7 [2022-12-14 09:15:11,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:15:11,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:15:11,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:15:11,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:15:11,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:15:11,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:15:11,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:15:11,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:15:11,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:15:11,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:15:11,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:15:11,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:15:11,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:15:11,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:15:11,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:15:11,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:15:11,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:15:11,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:15:11,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:15:11,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:15:11,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:15:11,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:15:11,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:15:11,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:15:11,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:15:11,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:15:11,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:15:11,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:15:11,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:15:11,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:15:11,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:15:11,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:15:11,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:15:11,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:15:11,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:15:11,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:15:11,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:15:11,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:15:11,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:15:11,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:15:11,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:15:11,683 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:15:11,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:15:11,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:15:11,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:15:11,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:15:11,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:15:11,684 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:15:11,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:15:11,685 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:15:11,685 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:15:11,685 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:15:11,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:15:11,685 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:15:11,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:15:11,685 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:15:11,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:15:11,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:15:11,686 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:15:11,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:15:11,686 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:15:11,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:15:11,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:15:11,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:15:11,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:15:11,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:15:11,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:15:11,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:15:11,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:15:11,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:15:11,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:15:11,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:15:11,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:15:11,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:15:11,689 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_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-12-14 09:15:11,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:15:11,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:15:11,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:15:11,883 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:15:11,883 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:15:11,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops/vogal-1.i [2022-12-14 09:15:14,394 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:15:14,571 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:15:14,572 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/sv-benchmarks/c/loops/vogal-1.i [2022-12-14 09:15:14,576 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/data/0e124b3ff/ca8a6d01340b481f9e7e84e5ab43f507/FLAG13b53033a [2022-12-14 09:15:14,964 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/data/0e124b3ff/ca8a6d01340b481f9e7e84e5ab43f507 [2022-12-14 09:15:14,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:15:14,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:15:14,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:15:14,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:15:14,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:15:14,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:15:14" (1/1) ... [2022-12-14 09:15:14,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b329ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:14, skipping insertion in model container [2022-12-14 09:15:14,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:15:14" (1/1) ... [2022-12-14 09:15:14,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:15:14,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:15:15,087 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_04dd0074-0026-45de-83ac-5cfdf03e0403/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-12-14 09:15:15,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:15:15,107 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:15:15,116 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_04dd0074-0026-45de-83ac-5cfdf03e0403/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-12-14 09:15:15,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:15:15,134 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:15:15,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15 WrapperNode [2022-12-14 09:15:15,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:15:15,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:15:15,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:15:15,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:15:15,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,161 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-12-14 09:15:15,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:15:15,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:15:15,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:15:15,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:15:15,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:15:15,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:15:15,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:15:15,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:15:15,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (1/1) ... [2022-12-14 09:15:15,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:15:15,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:15,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:15:15,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:15:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:15:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:15:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:15:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:15:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:15:15,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:15:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:15:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:15:15,288 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:15:15,290 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:15:15,445 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:15:15,492 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:15:15,492 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 09:15:15,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:15:15 BoogieIcfgContainer [2022-12-14 09:15:15,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:15:15,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:15:15,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:15:15,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:15:15,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:15:14" (1/3) ... [2022-12-14 09:15:15,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7143e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:15:15, skipping insertion in model container [2022-12-14 09:15:15,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:15:15" (2/3) ... [2022-12-14 09:15:15,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7143e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:15:15, skipping insertion in model container [2022-12-14 09:15:15,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:15:15" (3/3) ... [2022-12-14 09:15:15,500 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-12-14 09:15:15,514 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:15:15,514 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:15:15,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:15:15,555 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;@22a4f422, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:15:15,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:15:15,559 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) [2022-12-14 09:15:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:15:15,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:15,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:15:15,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash 682810099, now seen corresponding path program 1 times [2022-12-14 09:15:15,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:15,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797244271] [2022-12-14 09:15:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:15,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:15:15,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:15,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797244271] [2022-12-14 09:15:15,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797244271] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:15:15,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:15:15,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:15:15,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828663852] [2022-12-14 09:15:15,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:15,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 09:15:15,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 09:15:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:15:15,730 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) [2022-12-14 09:15:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:15,762 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-12-14 09:15:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 09:15:15,764 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 [2022-12-14 09:15:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:15,771 INFO L225 Difference]: With dead ends: 31 [2022-12-14 09:15:15,771 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 09:15:15,774 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 [2022-12-14 09:15:15,776 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 [2022-12-14 09:15:15,777 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] [2022-12-14 09:15:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 09:15:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 09:15:15,797 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) [2022-12-14 09:15:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-12-14 09:15:15,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 10 [2022-12-14 09:15:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:15,798 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-12-14 09:15:15,799 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) [2022-12-14 09:15:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-12-14 09:15:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:15:15,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:15,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:15:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:15:15,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -545169927, now seen corresponding path program 1 times [2022-12-14 09:15:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:15,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547484049] [2022-12-14 09:15:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:15,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:15:15,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:15,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547484049] [2022-12-14 09:15:15,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547484049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:15:15,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:15:15,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:15:15,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672451375] [2022-12-14 09:15:15,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:15:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:15:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:15:15,919 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) [2022-12-14 09:15:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:15,959 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2022-12-14 09:15:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:15:15,960 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 [2022-12-14 09:15:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:15,960 INFO L225 Difference]: With dead ends: 38 [2022-12-14 09:15:15,960 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 09:15:15,961 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 [2022-12-14 09:15:15,963 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 [2022-12-14 09:15:15,963 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] [2022-12-14 09:15:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 09:15:15,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2022-12-14 09:15:15,968 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) [2022-12-14 09:15:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-12-14 09:15:15,968 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 12 [2022-12-14 09:15:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:15,969 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-12-14 09:15:15,969 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) [2022-12-14 09:15:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-12-14 09:15:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:15:15,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:15,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:15:15,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:15:15,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash -268015701, now seen corresponding path program 1 times [2022-12-14 09:15:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:15,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800019957] [2022-12-14 09:15:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:15,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:15:16,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:16,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800019957] [2022-12-14 09:15:16,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800019957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:16,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721506937] [2022-12-14 09:15:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:16,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:16,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:16,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:15:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:16,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:15:16,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:15:16,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:15:16,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721506937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:15:16,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:15:16,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-12-14 09:15:16,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488017018] [2022-12-14 09:15:16,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:16,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:15:16,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:15:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:15:16,205 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) [2022-12-14 09:15:16,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:16,261 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-12-14 09:15:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:15:16,262 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 [2022-12-14 09:15:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:16,263 INFO L225 Difference]: With dead ends: 32 [2022-12-14 09:15:16,263 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 09:15:16,263 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 [2022-12-14 09:15:16,264 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:15:16,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:15:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 09:15:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-12-14 09:15:16,267 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) [2022-12-14 09:15:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-12-14 09:15:16,267 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 13 [2022-12-14 09:15:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:16,268 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-12-14 09:15:16,268 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) [2022-12-14 09:15:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-12-14 09:15:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:15:16,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:16,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:15:16,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:15:16,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:16,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash 334371122, now seen corresponding path program 1 times [2022-12-14 09:15:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502892548] [2022-12-14 09:15:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:16,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:15:16,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:16,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502892548] [2022-12-14 09:15:16,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502892548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:16,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646426879] [2022-12-14 09:15:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:16,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:16,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:16,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:16,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:15:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:15:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:15:16,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:15:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646426879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:15:16,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:15:16,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-12-14 09:15:16,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534541277] [2022-12-14 09:15:16,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:16,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:15:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:15:16,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:15:16,746 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) [2022-12-14 09:15:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:16,792 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-12-14 09:15:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:15:16,792 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 [2022-12-14 09:15:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:16,793 INFO L225 Difference]: With dead ends: 53 [2022-12-14 09:15:16,793 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 09:15:16,793 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 [2022-12-14 09:15:16,794 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 [2022-12-14 09:15:16,794 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] [2022-12-14 09:15:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 09:15:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2022-12-14 09:15:16,797 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) [2022-12-14 09:15:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-12-14 09:15:16,798 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2022-12-14 09:15:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:16,798 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-12-14 09:15:16,798 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) [2022-12-14 09:15:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-12-14 09:15:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:15:16,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:16,799 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:15:16,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:15:17,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:17,000 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2008657713, now seen corresponding path program 1 times [2022-12-14 09:15:17,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238628141] [2022-12-14 09:15:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:15:17,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:17,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238628141] [2022-12-14 09:15:17,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238628141] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:17,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90303574] [2022-12-14 09:15:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:17,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:17,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:17,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:17,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:15:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:15:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:17,211 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 [2022-12-14 09:15:17,264 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 [2022-12-14 09:15:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:15:17,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:15:17,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90303574] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:17,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:15:17,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 12 [2022-12-14 09:15:17,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234084821] [2022-12-14 09:15:17,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:17,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:15:17,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:17,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:15:17,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:15:17,395 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) [2022-12-14 09:15:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:17,529 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-12-14 09:15:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:15:17,530 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 [2022-12-14 09:15:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:17,530 INFO L225 Difference]: With dead ends: 37 [2022-12-14 09:15:17,530 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 09:15:17,531 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 [2022-12-14 09:15:17,531 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 [2022-12-14 09:15:17,532 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] [2022-12-14 09:15:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 09:15:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 09:15:17,536 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) [2022-12-14 09:15:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-12-14 09:15:17,536 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 17 [2022-12-14 09:15:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:17,536 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-12-14 09:15:17,536 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) [2022-12-14 09:15:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-12-14 09:15:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:15:17,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:17,537 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:15:17,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:15:17,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:17,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -301318537, now seen corresponding path program 1 times [2022-12-14 09:15:17,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:17,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49589216] [2022-12-14 09:15:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:17,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:15:17,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49589216] [2022-12-14 09:15:17,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49589216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69412503] [2022-12-14 09:15:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:17,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:17,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:17,914 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:17,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:15:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:17,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:15:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:17,978 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 [2022-12-14 09:15:18,028 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 [2022-12-14 09:15:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:15:18,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:15:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69412503] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:18,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:15:18,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 12 [2022-12-14 09:15:18,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093446740] [2022-12-14 09:15:18,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:15:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:18,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:15:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:15:18,166 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) [2022-12-14 09:15:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:18,293 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2022-12-14 09:15:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:15:18,294 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 [2022-12-14 09:15:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:18,294 INFO L225 Difference]: With dead ends: 36 [2022-12-14 09:15:18,294 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 09:15:18,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:15:18,295 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-12-14 09:15:18,296 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] [2022-12-14 09:15:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 09:15:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-12-14 09:15:18,301 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) [2022-12-14 09:15:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-12-14 09:15:18,302 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 18 [2022-12-14 09:15:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:18,302 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-12-14 09:15:18,303 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) [2022-12-14 09:15:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-12-14 09:15:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:15:18,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:18,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:15:18,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:15:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 09:15:18,504 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -240200662, now seen corresponding path program 1 times [2022-12-14 09:15:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246079564] [2022-12-14 09:15:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:18,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 09:15:18,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:18,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246079564] [2022-12-14 09:15:18,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246079564] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:18,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213186015] [2022-12-14 09:15:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:18,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:18,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:18,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:18,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:15:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:15:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 09:15:18,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:15:18,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213186015] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:15:18,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363736918] [2022-12-14 09:15:18,697 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 09:15:18,697 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:15:18,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:15:18,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:15:18,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:15:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,789 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:15:18,789 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 [2022-12-14 09:15:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,811 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 [2022-12-14 09:15:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,869 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 [2022-12-14 09:15:18,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:19,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:19,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:19,133 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:15:19,134 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 [2022-12-14 09:15:19,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-14 09:15:19,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:15:19,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1363736918] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:15:19,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:15:19,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [3, 3, 5] total 17 [2022-12-14 09:15:19,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811443858] [2022-12-14 09:15:19,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:19,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:15:19,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:15:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:15:19,724 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) [2022-12-14 09:15:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:19,801 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-12-14 09:15:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:15:19,802 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 [2022-12-14 09:15:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:19,803 INFO L225 Difference]: With dead ends: 39 [2022-12-14 09:15:19,803 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 09:15:19,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:15:19,804 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 [2022-12-14 09:15:19,805 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] [2022-12-14 09:15:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 09:15:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-12-14 09:15:19,812 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) [2022-12-14 09:15:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-12-14 09:15:19,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 19 [2022-12-14 09:15:19,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:19,812 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-12-14 09:15:19,812 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) [2022-12-14 09:15:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-12-14 09:15:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:15:19,813 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:19,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:15:19,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:15:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 09:15:20,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2018430215, now seen corresponding path program 1 times [2022-12-14 09:15:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:20,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116107850] [2022-12-14 09:15:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:20,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:15:20,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:20,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116107850] [2022-12-14 09:15:20,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116107850] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:20,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744526342] [2022-12-14 09:15:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:20,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:20,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:20,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:20,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:15:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:20,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:15:20,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:15:20,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 09:15:20,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744526342] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:20,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:15:20,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2022-12-14 09:15:20,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184000971] [2022-12-14 09:15:20,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:20,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:15:20,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:15:20,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:15:20,155 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) [2022-12-14 09:15:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:20,178 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2022-12-14 09:15:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:15:20,178 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 [2022-12-14 09:15:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:20,179 INFO L225 Difference]: With dead ends: 40 [2022-12-14 09:15:20,179 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 09:15:20,179 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 [2022-12-14 09:15:20,180 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 [2022-12-14 09:15:20,180 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] [2022-12-14 09:15:20,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 09:15:20,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-14 09:15:20,187 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) [2022-12-14 09:15:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-12-14 09:15:20,187 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 21 [2022-12-14 09:15:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:20,188 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-12-14 09:15:20,188 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) [2022-12-14 09:15:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-12-14 09:15:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 09:15:20,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:20,189 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] [2022-12-14 09:15:20,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:15:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:20,391 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1616256613, now seen corresponding path program 1 times [2022-12-14 09:15:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:20,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524720614] [2022-12-14 09:15:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:15:20,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524720614] [2022-12-14 09:15:20,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524720614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715277204] [2022-12-14 09:15:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:20,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:20,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:20,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:15:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 09:15:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:20,615 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 [2022-12-14 09:15:20,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:15:20,775 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 [2022-12-14 09:15:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:15:20,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:15:22,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715277204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:15:22,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752867005] [2022-12-14 09:15:22,215 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:15:22,215 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:15:22,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:15:22,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:15:22,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:15:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,264 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:15:22,265 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 [2022-12-14 09:15:22,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,278 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 [2022-12-14 09:15:22,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,317 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 [2022-12-14 09:15:22,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:22,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:22,513 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:15:22,514 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 [2022-12-14 09:15:22,645 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 [2022-12-14 09:15:22,974 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:15:23,603 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 [2022-12-14 09:15:23,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:15:23,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:15:23,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 10, 9] total 20 [2022-12-14 09:15:23,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727505529] [2022-12-14 09:15:23,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:15:23,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 09:15:23,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 09:15:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:15:23,605 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) [2022-12-14 09:15:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:26,470 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-12-14 09:15:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 09:15:26,471 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 [2022-12-14 09:15:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:26,472 INFO L225 Difference]: With dead ends: 88 [2022-12-14 09:15:26,472 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 09:15:26,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 09:15:26,473 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:15:26,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 112 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:15:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 09:15:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 31. [2022-12-14 09:15:26,482 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) [2022-12-14 09:15:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-12-14 09:15:26,482 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2022-12-14 09:15:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:26,482 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-12-14 09:15:26,482 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) [2022-12-14 09:15:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-12-14 09:15:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:15:26,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:26,483 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] [2022-12-14 09:15:26,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:15:26,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:26,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:26,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1638150324, now seen corresponding path program 2 times [2022-12-14 09:15:26,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:26,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000255610] [2022-12-14 09:15:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:26,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:15:26,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:26,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000255610] [2022-12-14 09:15:26,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000255610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:26,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115599325] [2022-12-14 09:15:26,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:15:26,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:26,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:26,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:15:26,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:15:26,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:15:26,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:15:26,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:15:26,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:15:26,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115599325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:15:26,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1639799618] [2022-12-14 09:15:26,920 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:15:26,920 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:15:26,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:15:26,920 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:15:26,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:15:26,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:26,967 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:15:26,967 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 [2022-12-14 09:15:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,007 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:15:27,007 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 [2022-12-14 09:15:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,040 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 [2022-12-14 09:15:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:27,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:27,250 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:15:27,250 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 [2022-12-14 09:15:27,338 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 [2022-12-14 09:15:27,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:15:28,037 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 [2022-12-14 09:15:28,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:15:28,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:15:28,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-14 09:15:28,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740167859] [2022-12-14 09:15:28,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:15:28,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:15:28,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:28,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:15:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:15:28,039 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) [2022-12-14 09:15:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:28,171 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2022-12-14 09:15:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:15:28,172 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 [2022-12-14 09:15:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:28,172 INFO L225 Difference]: With dead ends: 110 [2022-12-14 09:15:28,172 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 09:15:28,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:15:28,174 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 [2022-12-14 09:15:28,174 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] [2022-12-14 09:15:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 09:15:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 34. [2022-12-14 09:15:28,183 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) [2022-12-14 09:15:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-12-14 09:15:28,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2022-12-14 09:15:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:28,184 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-12-14 09:15:28,184 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) [2022-12-14 09:15:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-12-14 09:15:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 09:15:28,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:28,184 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] [2022-12-14 09:15:28,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:15:28,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 09:15:28,386 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2125385662, now seen corresponding path program 3 times [2022-12-14 09:15:28,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:28,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677636539] [2022-12-14 09:15:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:15:28,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677636539] [2022-12-14 09:15:28,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677636539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437456832] [2022-12-14 09:15:28,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:15:28,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:28,502 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:28,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:15:28,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:15:28,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:15:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:15:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 09:15:28,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:15:28,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437456832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:15:28,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1244948228] [2022-12-14 09:15:28,600 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:15:28,600 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:15:28,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:15:28,601 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:15:28,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:15:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,648 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:15:28,648 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 [2022-12-14 09:15:28,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,664 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 [2022-12-14 09:15:28,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,695 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 [2022-12-14 09:15:28,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:28,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:28,915 INFO L321 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-12-14 09:15:28,916 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 [2022-12-14 09:15:28,971 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 [2022-12-14 09:15:29,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:15:30,056 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 [2022-12-14 09:15:30,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:15:30,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:15:30,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-12-14 09:15:30,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25296760] [2022-12-14 09:15:30,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:15:30,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:15:30,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:15:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:15:30,058 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) [2022-12-14 09:15:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:30,115 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-12-14 09:15:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:15:30,116 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 [2022-12-14 09:15:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:30,116 INFO L225 Difference]: With dead ends: 53 [2022-12-14 09:15:30,117 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 09:15:30,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:15:30,117 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:15:30,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:15:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 09:15:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-12-14 09:15:30,128 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) [2022-12-14 09:15:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-12-14 09:15:30,128 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2022-12-14 09:15:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:30,128 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-12-14 09:15:30,129 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) [2022-12-14 09:15:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-12-14 09:15:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 09:15:30,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:30,129 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] [2022-12-14 09:15:30,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:15:30,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:15:30,331 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2006983306, now seen corresponding path program 4 times [2022-12-14 09:15:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:30,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621207383] [2022-12-14 09:15:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:15:34,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621207383] [2022-12-14 09:15:34,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621207383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:15:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126718065] [2022-12-14 09:15:34,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:15:34,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:15:34,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:15:34,018 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:15:34,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:15:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 09:15:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:15:34,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:15:34,980 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 [2022-12-14 09:15:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:15:35,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:15:37,294 INFO L321 Elim1Store]: treesize reduction 157, result has 42.5 percent of original size [2022-12-14 09:15:37,295 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 [2022-12-14 09:15:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 09:15:40,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126718065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:15:40,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1494345984] [2022-12-14 09:15:40,689 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:15:40,689 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:15:40,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:15:40,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:15:40,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:15:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,728 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:15:40,729 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 [2022-12-14 09:15:40,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,761 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:15:40,762 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 [2022-12-14 09:15:40,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,803 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 [2022-12-14 09:15:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:15:40,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:15:41,003 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:15:41,003 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 [2022-12-14 09:15:41,103 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 [2022-12-14 09:15:41,340 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:15:42,198 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 [2022-12-14 09:15:42,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:15:42,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:15:42,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 12] total 42 [2022-12-14 09:15:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271117261] [2022-12-14 09:15:42,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:15:42,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 09:15:42,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 09:15:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 09:15:42,200 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) [2022-12-14 09:16:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:19,592 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-12-14 09:16:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-14 09:16:19,592 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 [2022-12-14 09:16:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:19,593 INFO L225 Difference]: With dead ends: 164 [2022-12-14 09:16:19,594 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 09:16:19,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5267 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=1969, Invalid=14543, Unknown=0, NotChecked=0, Total=16512 [2022-12-14 09:16:19,602 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 529 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:19,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 219 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 09:16:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 09:16:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 51. [2022-12-14 09:16:19,652 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) [2022-12-14 09:16:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-12-14 09:16:19,653 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 28 [2022-12-14 09:16:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:19,653 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-12-14 09:16:19,653 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) [2022-12-14 09:16:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-12-14 09:16:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 09:16:19,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:19,655 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] [2022-12-14 09:16:19,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 09:16:19,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:19,856 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1785196442, now seen corresponding path program 5 times [2022-12-14 09:16:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:19,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846920935] [2022-12-14 09:16:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:16:20,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846920935] [2022-12-14 09:16:20,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846920935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382238595] [2022-12-14 09:16:20,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:16:20,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:20,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:20,567 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:20,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:16:20,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:16:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:16:20,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:16:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:20,755 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 [2022-12-14 09:16:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 09:16:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:16:20,918 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 09:16:20,918 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 [2022-12-14 09:16:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 09:16:20,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382238595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:16:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780379802] [2022-12-14 09:16:20,956 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:16:20,956 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:16:20,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:16:20,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:16:20,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:16:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:20,997 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:16:20,998 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 [2022-12-14 09:16:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,037 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:16:21,037 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 [2022-12-14 09:16:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,070 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 [2022-12-14 09:16:21,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:21,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:21,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:21,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:21,258 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:16:21,258 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 [2022-12-14 09:16:21,357 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 [2022-12-14 09:16:21,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:16:22,590 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 [2022-12-14 09:16:22,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:16:22,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:16:22,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 23 [2022-12-14 09:16:22,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481271495] [2022-12-14 09:16:22,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:16:22,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:16:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:16:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 09:16:22,593 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) [2022-12-14 09:16:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:22,996 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-12-14 09:16:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:16:22,996 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 [2022-12-14 09:16:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:22,997 INFO L225 Difference]: With dead ends: 75 [2022-12-14 09:16:22,997 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 09:16:22,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 09:16:22,998 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 09:16:22,998 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] [2022-12-14 09:16:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 09:16:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 09:16:23,023 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) [2022-12-14 09:16:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-12-14 09:16:23,023 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2022-12-14 09:16:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:23,023 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-12-14 09:16:23,024 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) [2022-12-14 09:16:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-12-14 09:16:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:16:23,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:23,024 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] [2022-12-14 09:16:23,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 09:16:23,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:23,226 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:23,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2112038823, now seen corresponding path program 6 times [2022-12-14 09:16:23,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:23,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303458497] [2022-12-14 09:16:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:23,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 09:16:23,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303458497] [2022-12-14 09:16:23,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303458497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719489636] [2022-12-14 09:16:23,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:16:23,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:23,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:23,723 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:23,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:16:23,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:16:23,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:16:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:16:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:23,982 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 [2022-12-14 09:16:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 09:16:23,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:16:24,145 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 09:16:24,146 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 [2022-12-14 09:16:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 09:16:24,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719489636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:16:24,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154527951] [2022-12-14 09:16:24,182 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:16:24,182 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:16:24,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:16:24,182 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:16:24,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:16:24,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,220 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:16:24,220 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 [2022-12-14 09:16:24,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,261 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:16:24,261 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 [2022-12-14 09:16:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,290 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 [2022-12-14 09:16:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:24,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:24,447 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:16:24,447 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 [2022-12-14 09:16:24,547 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 [2022-12-14 09:16:24,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:16:25,546 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 [2022-12-14 09:16:25,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:16:25,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:16:25,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 23 [2022-12-14 09:16:25,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178721533] [2022-12-14 09:16:25,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:16:25,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:16:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:25,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:16:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 09:16:25,548 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) [2022-12-14 09:16:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:25,828 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-12-14 09:16:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 09:16:25,829 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 [2022-12-14 09:16:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:25,829 INFO L225 Difference]: With dead ends: 57 [2022-12-14 09:16:25,829 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 09:16:25,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 09:16:25,831 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-12-14 09:16:25,831 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] [2022-12-14 09:16:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 09:16:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2022-12-14 09:16:25,855 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) [2022-12-14 09:16:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-12-14 09:16:25,855 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2022-12-14 09:16:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:25,856 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-12-14 09:16:25,856 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) [2022-12-14 09:16:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-12-14 09:16:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 09:16:25,856 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:25,856 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] [2022-12-14 09:16:25,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:16:26,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 09:16:26,057 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:26,057 INFO L85 PathProgramCache]: Analyzing trace with hash -505912715, now seen corresponding path program 7 times [2022-12-14 09:16:26,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:26,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403082930] [2022-12-14 09:16:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 09:16:26,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403082930] [2022-12-14 09:16:26,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403082930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43393113] [2022-12-14 09:16:26,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:16:26,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:26,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:26,196 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:26,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:16:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:26,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:16:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 09:16:26,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:16:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 09:16:26,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43393113] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:16:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778543419] [2022-12-14 09:16:26,510 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:16:26,510 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:16:26,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:16:26,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:16:26,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:16:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,551 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:16:26,551 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 [2022-12-14 09:16:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,589 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:16:26,589 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 [2022-12-14 09:16:26,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,618 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 [2022-12-14 09:16:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:26,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:26,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:26,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:26,807 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:16:26,808 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 [2022-12-14 09:16:26,909 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 [2022-12-14 09:16:27,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:16:28,079 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 [2022-12-14 09:16:28,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:16:28,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:16:28,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 22 [2022-12-14 09:16:28,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044917903] [2022-12-14 09:16:28,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:16:28,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:16:28,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:16:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:16:28,081 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) [2022-12-14 09:16:32,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:32,403 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2022-12-14 09:16:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-14 09:16:32,404 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 [2022-12-14 09:16:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:32,404 INFO L225 Difference]: With dead ends: 191 [2022-12-14 09:16:32,404 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 09:16:32,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1018, Invalid=6814, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 09:16:32,406 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 449 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:32,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 120 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:16:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 09:16:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 49. [2022-12-14 09:16:32,437 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) [2022-12-14 09:16:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-12-14 09:16:32,437 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 35 [2022-12-14 09:16:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:32,437 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-12-14 09:16:32,437 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) [2022-12-14 09:16:32,438 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-12-14 09:16:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 09:16:32,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:32,438 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] [2022-12-14 09:16:32,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:16:32,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:32,640 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 151018505, now seen corresponding path program 8 times [2022-12-14 09:16:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:32,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509015950] [2022-12-14 09:16:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:16:45,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509015950] [2022-12-14 09:16:45,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509015950] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981917033] [2022-12-14 09:16:45,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:16:45,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:45,165 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:45,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:16:45,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 09:16:45,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:16:45,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 09:16:45,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:45,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 09:16:45,470 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 [2022-12-14 09:16:45,526 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 [2022-12-14 09:16:45,576 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 [2022-12-14 09:16:45,585 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 [2022-12-14 09:16:45,594 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 [2022-12-14 09:16:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:50,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:50,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:50,045 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 [2022-12-14 09:16:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:16:50,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:17:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:17:30,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981917033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:17:30,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911462501] [2022-12-14 09:17:30,227 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:17:30,228 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:17:30,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:17:30,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:17:30,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:17:30,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,268 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:17:30,268 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 [2022-12-14 09:17:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,298 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:17:30,298 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 [2022-12-14 09:17:30,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,328 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 [2022-12-14 09:17:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:30,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:30,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:30,486 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:17:30,487 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 [2022-12-14 09:17:30,576 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 [2022-12-14 09:17:30,853 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:17:33,576 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 [2022-12-14 09:17:33,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:17:33,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:17:33,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 20] total 73 [2022-12-14 09:17:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54326323] [2022-12-14 09:17:33,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:17:33,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 09:17:33,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:17:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 09:17:33,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=6791, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 09:17:33,580 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) [2022-12-14 09:18:02,994 WARN L233 SmtUtils]: Spent 6.00s 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) [2022-12-14 09:18:21,055 WARN L233 SmtUtils]: Spent 5.26s 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) [2022-12-14 09:18:49,649 WARN L233 SmtUtils]: Spent 7.90s 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) [2022-12-14 09:18:56,048 WARN L233 SmtUtils]: Spent 5.66s 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) [2022-12-14 09:19:13,683 WARN L233 SmtUtils]: Spent 5.90s 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) [2022-12-14 09:19:35,750 WARN L233 SmtUtils]: Spent 6.20s 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) [2022-12-14 09:20:06,937 WARN L233 SmtUtils]: Spent 5.37s 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) [2022-12-14 09:20:17,991 WARN L233 SmtUtils]: Spent 5.56s 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) [2022-12-14 09:20:37,779 WARN L233 SmtUtils]: Spent 5.78s 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) [2022-12-14 09:20:57,532 WARN L233 SmtUtils]: Spent 5.31s 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) [2022-12-14 09:21:25,780 WARN L233 SmtUtils]: Spent 5.10s 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) [2022-12-14 09:22:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:30,878 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2022-12-14 09:22:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-12-14 09:22:30,879 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 [2022-12-14 09:22:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:30,880 INFO L225 Difference]: With dead ends: 198 [2022-12-14 09:22:30,880 INFO L226 Difference]: Without dead ends: 174 [2022-12-14 09:22:30,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10762 ImplicationChecksByTransitivity, 308.8s TimeCoverageRelationStatistics Valid=2653, Invalid=29567, Unknown=0, NotChecked=0, Total=32220 [2022-12-14 09:22:30,883 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 866 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s 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, 6.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:30,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 466 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-12-14 09:22:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-14 09:22:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 73. [2022-12-14 09:22:30,963 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) [2022-12-14 09:22:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-12-14 09:22:30,963 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 39 [2022-12-14 09:22:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:30,963 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-12-14 09:22:30,964 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) [2022-12-14 09:22:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-12-14 09:22:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:22:30,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:30,964 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] [2022-12-14 09:22:30,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:22:31,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:22:31,166 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash 320741985, now seen corresponding path program 9 times [2022-12-14 09:22:31,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:31,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389617362] [2022-12-14 09:22:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 09:22:31,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:31,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389617362] [2022-12-14 09:22:31,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389617362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:31,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164060885] [2022-12-14 09:22:31,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:22:31,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:31,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:31,379 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:31,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:22:31,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:22:31,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:22:31,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 09:22:31,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:31,761 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 [2022-12-14 09:22:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 09:22:31,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:32,050 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 09:22:32,050 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 [2022-12-14 09:22:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:22:32,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164060885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:32,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901299625] [2022-12-14 09:22:32,138 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:22:32,138 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:22:32,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:22:32,138 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:22:32,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:22:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,176 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:22:32,177 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 [2022-12-14 09:22:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,217 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:22:32,217 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 [2022-12-14 09:22:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,250 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 [2022-12-14 09:22:32,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:32,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:32,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:32,472 INFO L321 Elim1Store]: treesize reduction 706, result has 7.6 percent of original size [2022-12-14 09:22:32,473 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 [2022-12-14 09:22:32,524 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 [2022-12-14 09:22:32,812 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:22:33,620 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 [2022-12-14 09:22:33,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:22:33,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:22:33,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 11] total 34 [2022-12-14 09:22:33,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576371441] [2022-12-14 09:22:33,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:33,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 09:22:33,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 09:22:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1972, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 09:22:33,622 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) [2022-12-14 09:22:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:37,398 INFO L93 Difference]: Finished difference Result 296 states and 320 transitions. [2022-12-14 09:22:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-14 09:22:37,399 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 [2022-12-14 09:22:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:37,400 INFO L225 Difference]: With dead ends: 296 [2022-12-14 09:22:37,400 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 09:22:37,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=949, Invalid=11041, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 09:22:37,401 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 451 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 3310 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:37,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 900 Invalid, 3375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3310 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 09:22:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 09:22:37,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 70. [2022-12-14 09:22:37,483 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) [2022-12-14 09:22:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-12-14 09:22:37,484 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 43 [2022-12-14 09:22:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:37,484 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-12-14 09:22:37,484 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) [2022-12-14 09:22:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-12-14 09:22:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 09:22:37,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:37,484 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] [2022-12-14 09:22:37,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:22:37,686 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1262392551, now seen corresponding path program 10 times [2022-12-14 09:22:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:37,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722662480] [2022-12-14 09:22:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:22:38,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722662480] [2022-12-14 09:22:38,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722662480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:38,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256872626] [2022-12-14 09:22:38,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:22:38,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:38,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:38,712 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:38,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 09:22:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:22:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:38,943 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 [2022-12-14 09:22:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:22:38,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:39,151 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 09:22:39,151 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 [2022-12-14 09:22:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 09:22:39,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256872626] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:39,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196118574] [2022-12-14 09:22:39,207 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:22:39,207 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:22:39,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:22:39,208 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:22:39,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:22:39,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,241 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 09:22:39,242 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 [2022-12-14 09:22:39,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,276 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:22:39,277 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 [2022-12-14 09:22:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,307 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 [2022-12-14 09:22:39,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:39,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:39,473 INFO L321 Elim1Store]: treesize reduction 549, result has 13.8 percent of original size [2022-12-14 09:22:39,474 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 [2022-12-14 09:22:39,579 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 [2022-12-14 09:22:39,869 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:22:40,808 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 [2022-12-14 09:22:40,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:22:40,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:22:40,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-12-14 09:22:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531094258] [2022-12-14 09:22:40,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:40,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:22:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:22:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 09:22:40,809 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) [2022-12-14 09:22:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:41,599 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-12-14 09:22:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 09:22:41,599 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 [2022-12-14 09:22:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:41,600 INFO L225 Difference]: With dead ends: 106 [2022-12-14 09:22:41,600 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 09:22:41,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=336, Invalid=2970, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 09:22:41,601 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 124 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:41,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 151 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:22:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 09:22:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-12-14 09:22:41,671 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) [2022-12-14 09:22:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-12-14 09:22:41,671 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 44 [2022-12-14 09:22:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:41,672 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-12-14 09:22:41,672 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) [2022-12-14 09:22:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-12-14 09:22:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:22:41,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:41,672 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] [2022-12-14 09:22:41,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 09:22:41,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04dd0074-0026-45de-83ac-5cfdf03e0403/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:22:41,874 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:41,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1868939880, now seen corresponding path program 11 times [2022-12-14 09:22:41,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:41,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522771349] [2022-12-14 09:22:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:41,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat