./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P --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 15d1d7d49ed223522c6431664b8ff836ebc81296f5e11773e2197361bd8b13cf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:16:20,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:16:21,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:16:21,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:16:21,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:16:21,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:16:21,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:16:21,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:16:21,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:16:21,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:16:21,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:16:21,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:16:21,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:16:21,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:16:21,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:16:21,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:16:21,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:16:21,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:16:21,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:16:21,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:16:21,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:16:21,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:16:21,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:16:21,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:16:21,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:16:21,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:16:21,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:16:21,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:16:21,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:16:21,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:16:21,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:16:21,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:16:21,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:16:21,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:16:21,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:16:21,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:16:21,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:16:21,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:16:21,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:16:21,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:16:21,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:16:21,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:16:21,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:16:21,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:16:21,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:16:21,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:16:21,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:16:21,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:16:21,151 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:16:21,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:16:21,152 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:16:21,152 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:16:21,152 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:16:21,152 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:16:21,153 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:16:21,153 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:16:21,153 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:16:21,153 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:16:21,153 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:16:21,154 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:16:21,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:16:21,155 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:16:21,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:16:21,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:16:21,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:16:21,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:16:21,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:16:21,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:16:21,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:16:21,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:16:21,157 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:16:21,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:16:21,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:16:21,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:16:21,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:16:21,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:16:21,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:16:21,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:16:21,159 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:16:21,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:16:21,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:16:21,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:16:21,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:16:21,160 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15d1d7d49ed223522c6431664b8ff836ebc81296f5e11773e2197361bd8b13cf [2021-11-20 23:16:21,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:16:21,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:16:21,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:16:21,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:16:21,465 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:16:21,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2021-11-20 23:16:21,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/data/d5e01993f/8b0ae6f6ba114edf8ec76f727edfa52c/FLAG388c2c1e7 [2021-11-20 23:16:22,107 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:16:22,107 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2021-11-20 23:16:22,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/data/d5e01993f/8b0ae6f6ba114edf8ec76f727edfa52c/FLAG388c2c1e7 [2021-11-20 23:16:22,419 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/data/d5e01993f/8b0ae6f6ba114edf8ec76f727edfa52c [2021-11-20 23:16:22,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:16:22,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:16:22,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:16:22,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:16:22,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:16:22,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:22,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6acc14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22, skipping insertion in model container [2021-11-20 23:16:22,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:22,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:16:22,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:16:22,832 WARN L230 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_71c40016-686c-40be-b038-ad4841be94a7/sv-benchmarks/c/heap-manipulation/merge_sort-1.i[22632,22645] [2021-11-20 23:16:22,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:16:22,871 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:16:22,902 WARN L230 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_71c40016-686c-40be-b038-ad4841be94a7/sv-benchmarks/c/heap-manipulation/merge_sort-1.i[22632,22645] [2021-11-20 23:16:22,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:16:22,960 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:16:22,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22 WrapperNode [2021-11-20 23:16:22,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:16:22,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:16:22,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:16:22,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:16:22,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,068 INFO L137 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 285 [2021-11-20 23:16:23,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:16:23,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:16:23,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:16:23,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:16:23,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:16:23,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:16:23,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:16:23,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:16:23,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (1/1) ... [2021-11-20 23:16:23,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:16:23,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:23,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:16:23,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:16:23,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:16:23,249 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2021-11-20 23:16:23,249 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2021-11-20 23:16:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-11-20 23:16:23,253 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-11-20 23:16:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:16:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:16:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:16:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:16:23,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:16:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:16:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:16:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:16:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:16:23,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:16:23,378 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:16:23,380 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:16:23,881 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:16:23,944 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:16:23,944 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-11-20 23:16:23,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:23 BoogieIcfgContainer [2021-11-20 23:16:23,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:16:23,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:16:23,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:16:23,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:16:23,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:16:22" (1/3) ... [2021-11-20 23:16:23,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a13c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:23, skipping insertion in model container [2021-11-20 23:16:23,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:16:22" (2/3) ... [2021-11-20 23:16:23,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a13c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:16:23, skipping insertion in model container [2021-11-20 23:16:23,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:23" (3/3) ... [2021-11-20 23:16:23,957 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2021-11-20 23:16:23,961 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:16:23,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:16:24,014 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:16:24,022 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:16:24,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:16:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 61 states have (on average 1.901639344262295) internal successors, (116), 77 states have internal predecessors, (116), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 23:16:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:16:24,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:24,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:16:24,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash -27349111, now seen corresponding path program 1 times [2021-11-20 23:16:24,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:24,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184578322] [2021-11-20 23:16:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:24,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:24,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:24,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184578322] [2021-11-20 23:16:24,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184578322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:24,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:24,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:16:24,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016760373] [2021-11-20 23:16:24,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:24,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:16:24,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:16:24,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:16:24,244 INFO L87 Difference]: Start difference. First operand has 80 states, 61 states have (on average 1.901639344262295) internal successors, (116), 77 states have internal predecessors, (116), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:24,314 INFO L93 Difference]: Finished difference Result 156 states and 287 transitions. [2021-11-20 23:16:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:16:24,317 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:16:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:24,328 INFO L225 Difference]: With dead ends: 156 [2021-11-20 23:16:24,328 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 23:16:24,362 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:16:24,366 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:24,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 23:16:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-20 23:16:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 71 states have internal predecessors, (77), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:16:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2021-11-20 23:16:24,415 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 6 [2021-11-20 23:16:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:24,415 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2021-11-20 23:16:24,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2021-11-20 23:16:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:16:24,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:24,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:24,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:16:24,418 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:24,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1471689877, now seen corresponding path program 1 times [2021-11-20 23:16:24,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:24,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876109681] [2021-11-20 23:16:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:24,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:24,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:24,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876109681] [2021-11-20 23:16:24,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876109681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:24,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:24,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:16:24,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270862980] [2021-11-20 23:16:24,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:24,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:24,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:24,475 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:24,542 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2021-11-20 23:16:24,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:24,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:16:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:24,544 INFO L225 Difference]: With dead ends: 147 [2021-11-20 23:16:24,544 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 23:16:24,545 INFO L932 BasicCegarLoop]: 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 [2021-11-20 23:16:24,547 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:24,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:16:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 23:16:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-20 23:16:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 73 states have internal predecessors, (79), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:16:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2021-11-20 23:16:24,560 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 7 [2021-11-20 23:16:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:24,560 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2021-11-20 23:16:24,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2021-11-20 23:16:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:16:24,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:24,562 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:24,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:16:24,562 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:24,563 INFO L85 PathProgramCache]: Analyzing trace with hash 151165319, now seen corresponding path program 1 times [2021-11-20 23:16:24,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:24,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651523808] [2021-11-20 23:16:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:24,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:24,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:24,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651523808] [2021-11-20 23:16:24,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651523808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:24,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:24,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:16:24,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15584212] [2021-11-20 23:16:24,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:24,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:24,663 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:24,907 INFO L93 Difference]: Finished difference Result 199 states and 260 transitions. [2021-11-20 23:16:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 23:16:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:24,916 INFO L225 Difference]: With dead ends: 199 [2021-11-20 23:16:24,917 INFO L226 Difference]: Without dead ends: 194 [2021-11-20 23:16:24,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:24,925 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 230 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:24,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 186 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:16:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-20 23:16:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 79. [2021-11-20 23:16:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 76 states have internal predecessors, (83), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:16:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-11-20 23:16:24,955 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 9 [2021-11-20 23:16:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:24,956 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-11-20 23:16:24,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-11-20 23:16:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:16:24,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:24,959 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:24,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:16:24,959 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash -195178506, now seen corresponding path program 1 times [2021-11-20 23:16:24,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:24,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981492398] [2021-11-20 23:16:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:24,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:16:25,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:25,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981492398] [2021-11-20 23:16:25,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981492398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:25,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:25,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:16:25,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294125640] [2021-11-20 23:16:25,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:25,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:25,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:25,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:25,138 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:25,347 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-11-20 23:16:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:25,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 23:16:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:25,351 INFO L225 Difference]: With dead ends: 81 [2021-11-20 23:16:25,351 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 23:16:25,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:25,352 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 11 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:25,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 239 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:16:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 23:16:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-20 23:16:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 75 states have internal predecessors, (82), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:16:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-11-20 23:16:25,372 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 16 [2021-11-20 23:16:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:25,373 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-11-20 23:16:25,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-11-20 23:16:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 23:16:25,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:25,375 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:25,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:16:25,376 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 130237484, now seen corresponding path program 1 times [2021-11-20 23:16:25,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:25,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616252434] [2021-11-20 23:16:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:25,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:16:25,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616252434] [2021-11-20 23:16:25,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616252434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:25,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:25,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:16:25,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358048573] [2021-11-20 23:16:25,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:25,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:25,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:25,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:25,511 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:25,737 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2021-11-20 23:16:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:25,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 23:16:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:25,739 INFO L225 Difference]: With dead ends: 103 [2021-11-20 23:16:25,739 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 23:16:25,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:25,741 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:25,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 206 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:16:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 23:16:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2021-11-20 23:16:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 74 states have internal predecessors, (81), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:16:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2021-11-20 23:16:25,762 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 16 [2021-11-20 23:16:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:25,763 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2021-11-20 23:16:25,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2021-11-20 23:16:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:16:25,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:25,765 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:25,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:16:25,765 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:25,767 INFO L85 PathProgramCache]: Analyzing trace with hash 642186722, now seen corresponding path program 1 times [2021-11-20 23:16:25,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:25,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944264193] [2021-11-20 23:16:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:25,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:25,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944264193] [2021-11-20 23:16:25,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944264193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:25,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:25,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:16:25,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440121765] [2021-11-20 23:16:25,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:25,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:25,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:25,907 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:26,145 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2021-11-20 23:16:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:16:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 23:16:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:26,147 INFO L225 Difference]: With dead ends: 174 [2021-11-20 23:16:26,148 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 23:16:26,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:16:26,149 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 179 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:26,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 190 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:16:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 23:16:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 83. [2021-11-20 23:16:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 80 states have internal predecessors, (87), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:16:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-11-20 23:16:26,159 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 19 [2021-11-20 23:16:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:26,160 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-11-20 23:16:26,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-11-20 23:16:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:16:26,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:26,166 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:26,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:16:26,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1429123203, now seen corresponding path program 1 times [2021-11-20 23:16:26,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:26,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246316531] [2021-11-20 23:16:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:26,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:26,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:26,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246316531] [2021-11-20 23:16:26,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246316531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:26,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:26,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:16:26,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465141680] [2021-11-20 23:16:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:26,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:26,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:26,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:26,238 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:26,462 INFO L93 Difference]: Finished difference Result 173 states and 214 transitions. [2021-11-20 23:16:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:16:26,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 23:16:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:26,464 INFO L225 Difference]: With dead ends: 173 [2021-11-20 23:16:26,464 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 23:16:26,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:16:26,466 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 177 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:26,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 190 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:16:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 23:16:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 89. [2021-11-20 23:16:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 75 states have (on average 1.24) internal successors, (93), 86 states have internal predecessors, (93), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:16:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2021-11-20 23:16:26,474 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 19 [2021-11-20 23:16:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:26,474 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2021-11-20 23:16:26,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2021-11-20 23:16:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:16:26,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:26,476 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:26,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:16:26,476 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1434014563, now seen corresponding path program 1 times [2021-11-20 23:16:26,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797518302] [2021-11-20 23:16:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:26,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:26,557 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797518302] [2021-11-20 23:16:26,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797518302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605254716] [2021-11-20 23:16:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:26,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:26,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:26,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:26,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:16:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:26,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 23:16:26,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:26,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:26,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 23:16:26,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:26,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-20 23:16:26,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 21 [2021-11-20 23:16:26,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 10 [2021-11-20 23:16:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:26,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:16:27,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605254716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:27,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622924440] [2021-11-20 23:16:27,161 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-20 23:16:27,169 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:27,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:27,183 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:27,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:27,436 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-20 23:16:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-20 23:16:27,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 [2021-11-20 23:16:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-20 23:16:27,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 83 treesize of output 64 [2021-11-20 23:16:27,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-11-20 23:16:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:27,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-20 23:16:28,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:28,783 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-20 23:16:28,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 475 [2021-11-20 23:16:28,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:29,240 INFO L354 Elim1Store]: treesize reduction 171, result has 37.1 percent of original size [2021-11-20 23:16:29,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 475 treesize of output 546 [2021-11-20 23:16:29,406 INFO L354 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2021-11-20 23:16:29,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 536 [2021-11-20 23:16:29,945 INFO L354 Elim1Store]: treesize reduction 200, result has 30.6 percent of original size [2021-11-20 23:16:29,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 539 treesize of output 607 [2021-11-20 23:16:30,249 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-11-20 23:16:30,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 598 treesize of output 629 [2021-11-20 23:16:30,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,468 INFO L354 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2021-11-20 23:16:30,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 627 treesize of output 619 [2021-11-20 23:16:30,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,604 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-20 23:16:30,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 624 treesize of output 611 [2021-11-20 23:16:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:30,873 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-20 23:16:30,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 616 treesize of output 679 [2021-11-20 23:16:30,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:31,084 INFO L354 Elim1Store]: treesize reduction 233, result has 26.0 percent of original size [2021-11-20 23:16:31,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 679 treesize of output 742 [2021-11-20 23:16:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:46,011 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-20 23:16:46,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 48 [2021-11-20 23:16:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:46,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:46,029 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-20 23:16:46,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 36 [2021-11-20 23:16:46,068 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:16:46,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 23:16:46,099 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 23:16:46,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-20 23:16:46,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:46,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:46,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-20 23:16:46,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:46,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:46,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-20 23:16:48,534 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:16:48,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 23:16:48,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:48,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:48,578 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-20 23:16:48,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-11-20 23:16:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:48,618 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-20 23:16:48,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 48 [2021-11-20 23:16:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:48,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:48,677 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-20 23:16:48,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 36 [2021-11-20 23:16:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:48,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:48,769 INFO L354 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2021-11-20 23:16:48,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 37 [2021-11-20 23:16:48,804 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 23:16:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-20 23:16:48,851 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 47 for LOIs [2021-11-20 23:16:50,518 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:51,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:51,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:16:51,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-11-20 23:16:51,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51555038] [2021-11-20 23:16:51,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:51,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:16:51,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:16:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:16:51,286 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:51,570 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2021-11-20 23:16:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:16:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 23:16:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:51,572 INFO L225 Difference]: With dead ends: 239 [2021-11-20 23:16:51,572 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 23:16:51,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-20 23:16:51,574 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 234 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:51,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 310 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:16:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 23:16:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2021-11-20 23:16:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 93 states have internal predecessors, (101), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 23:16:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-11-20 23:16:51,582 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 22 [2021-11-20 23:16:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:51,583 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-11-20 23:16:51,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-11-20 23:16:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:16:51,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:51,584 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:51,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:51,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 23:16:51,810 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:51,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1107383367, now seen corresponding path program 1 times [2021-11-20 23:16:51,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:51,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439269562] [2021-11-20 23:16:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:51,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:16:51,830 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:16:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:16:51,869 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-20 23:16:51,869 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:16:51,870 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:16:51,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:16:51,879 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:51,882 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:16:51,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:16:51 BoogieIcfgContainer [2021-11-20 23:16:51,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:16:51,939 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:16:51,939 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:16:51,940 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:16:51,940 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:16:23" (3/4) ... [2021-11-20 23:16:51,942 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 23:16:51,999 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 23:16:51,999 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:16:52,000 INFO L158 Benchmark]: Toolchain (without parser) took 29576.41ms. Allocated memory was 123.7MB in the beginning and 192.9MB in the end (delta: 69.2MB). Free memory was 87.8MB in the beginning and 130.0MB in the end (delta: -42.2MB). Peak memory consumption was 26.4MB. Max. memory is 16.1GB. [2021-11-20 23:16:52,001 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 81.8MB. Free memory was 36.0MB in the beginning and 35.9MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:16:52,001 INFO L158 Benchmark]: CACSL2BoogieTranslator took 534.71ms. Allocated memory is still 123.7MB. Free memory was 87.5MB in the beginning and 91.3MB in the end (delta: -3.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 23:16:52,004 INFO L158 Benchmark]: Boogie Procedure Inliner took 109.85ms. Allocated memory is still 123.7MB. Free memory was 91.3MB in the beginning and 88.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:16:52,004 INFO L158 Benchmark]: Boogie Preprocessor took 92.81ms. Allocated memory is still 123.7MB. Free memory was 88.5MB in the beginning and 85.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:16:52,005 INFO L158 Benchmark]: RCFGBuilder took 781.59ms. Allocated memory is still 123.7MB. Free memory was 85.8MB in the beginning and 57.7MB in the end (delta: 28.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-20 23:16:52,005 INFO L158 Benchmark]: TraceAbstraction took 27989.68ms. Allocated memory was 123.7MB in the beginning and 192.9MB in the end (delta: 69.2MB). Free memory was 57.1MB in the beginning and 132.1MB in the end (delta: -75.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:16:52,005 INFO L158 Benchmark]: Witness Printer took 60.33ms. Allocated memory is still 192.9MB. Free memory was 132.1MB in the beginning and 130.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:16:52,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 81.8MB. Free memory was 36.0MB in the beginning and 35.9MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 534.71ms. Allocated memory is still 123.7MB. Free memory was 87.5MB in the beginning and 91.3MB in the end (delta: -3.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 109.85ms. Allocated memory is still 123.7MB. Free memory was 91.3MB in the beginning and 88.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 92.81ms. Allocated memory is still 123.7MB. Free memory was 88.5MB in the beginning and 85.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 781.59ms. Allocated memory is still 123.7MB. Free memory was 85.8MB in the beginning and 57.7MB in the end (delta: 28.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 27989.68ms. Allocated memory was 123.7MB in the beginning and 192.9MB in the end (delta: 69.2MB). Free memory was 57.1MB in the beginning and 132.1MB in the end (delta: -75.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 60.33ms. Allocated memory is still 192.9MB. Free memory was 132.1MB in the beginning and 130.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L638] struct list *data = ((void *)0); VAL [data={0:0}] [L639] COND TRUE __VERIFIER_nondet_int() [L640] struct node *node = malloc(sizeof *node); [L641] COND FALSE !(!node) [L643] node->next = node [L644] node->value = __VERIFIER_nondet_int() [L645] struct list *item = malloc(sizeof *item); [L646] COND FALSE !(!item) [L648] item->slist = node [L649] item->next = data [L650] data = item VAL [data={-3:0}, item={-3:0}, node={-2:0}] [L639] COND FALSE !(__VERIFIER_nondet_int()) [L652] COND FALSE !(!data) [L654] CALL inspect_before(data) [L615] COND FALSE !(!(shape)) VAL [shape={-3:0}, shape={-3:0}] [L616] shape->next VAL [shape={-3:0}, shape={-3:0}, shape->next={0:0}] [L616] COND FALSE !(shape->next) [L622] COND FALSE !(!(shape)) VAL [shape={-3:0}, shape={-3:0}] [L623] EXPR shape->next VAL [shape={-3:0}, shape={-3:0}, shape->next={0:0}] [L623] COND FALSE !(!(shape->next == ((void *)0))) [L624] EXPR shape->slist VAL [shape={-3:0}, shape={-3:0}, shape->slist={-2:0}] [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [L625] EXPR shape->slist->next VAL [shape={-3:0}, shape={-3:0}, shape->slist={-2:0}, shape->slist->next={-2:0}] [L625] COND TRUE !(shape->slist->next == ((void *)0)) [L625] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 80 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 27.9s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 871 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 867 mSDsluCounter, 1577 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1105 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 812 IncrementalHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 561 mSDtfsCounter, 812 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=8, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 378 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 926 SizeOfPredicates, 12 NumberOfNonLiveVariables, 104 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 10/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 23:16:52,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c40016-686c-40be-b038-ad4841be94a7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE