./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH --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-9ad7fb2 [2021-11-03 05:25:10,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:25:10,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:25:10,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:25:10,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:25:10,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:25:10,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:25:10,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:25:10,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:25:10,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:25:10,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:25:10,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:25:10,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:25:10,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:25:10,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:25:10,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:25:10,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:25:10,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:25:10,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:25:10,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:25:10,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:25:10,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:25:10,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:25:10,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:25:10,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:25:10,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:25:10,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:25:10,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:25:10,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:25:10,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:25:10,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:25:10,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:25:10,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:25:10,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:25:10,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:25:10,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:25:10,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:25:10,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:25:10,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:25:10,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:25:10,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:25:10,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:25:10,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:25:10,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:25:10,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:25:10,422 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:25:10,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:25:10,423 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:25:10,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:25:10,424 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:25:10,424 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:25:10,425 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:25:10,425 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:25:10,425 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:25:10,426 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:25:10,426 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:25:10,426 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:25:10,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:25:10,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:25:10,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:25:10,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:25:10,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:25:10,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:25:10,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:25:10,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:25:10,430 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:25:10,430 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:25:10,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:25:10,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:25:10,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:25:10,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:25:10,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:25:10,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:25:10,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:25:10,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:25:10,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:25:10,433 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:25:10,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:25:10,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:25:10,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:25:10,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:25:10,435 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_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15d1d7d49ed223522c6431664b8ff836ebc81296f5e11773e2197361bd8b13cf [2021-11-03 05:25:10,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:25:10,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:25:10,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:25:10,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:25:10,720 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:25:10,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2021-11-03 05:25:10,803 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/data/51104c3a9/a1cdb4d544e2402c9a961540b561753b/FLAGf5add75a4 [2021-11-03 05:25:11,274 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:25:11,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2021-11-03 05:25:11,287 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/data/51104c3a9/a1cdb4d544e2402c9a961540b561753b/FLAGf5add75a4 [2021-11-03 05:25:11,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/data/51104c3a9/a1cdb4d544e2402c9a961540b561753b [2021-11-03 05:25:11,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:25:11,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:25:11,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:25:11,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:25:11,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:25:11,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:25:11" (1/1) ... [2021-11-03 05:25:11,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b63bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:11, skipping insertion in model container [2021-11-03 05:25:11,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:25:11" (1/1) ... [2021-11-03 05:25:11,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:25:11,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:25:12,010 WARN L228 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_009f408a-d196-4e11-a167-37219aa0ac92/sv-benchmarks/c/heap-manipulation/merge_sort-1.i[22632,22645] [2021-11-03 05:25:12,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:25:12,076 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:25:12,136 WARN L228 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_009f408a-d196-4e11-a167-37219aa0ac92/sv-benchmarks/c/heap-manipulation/merge_sort-1.i[22632,22645] [2021-11-03 05:25:12,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:25:12,183 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:25:12,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12 WrapperNode [2021-11-03 05:25:12,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:25:12,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:25:12,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:25:12,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:25:12,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:25:12,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:25:12,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:25:12,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:25:12,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:25:12,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:25:12,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:25:12,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:25:12,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (1/1) ... [2021-11-03 05:25:12,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:25:12,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:25:12,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:25:12,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:25:12,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 05:25:12,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 05:25:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:25:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:25:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:25:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:25:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:25:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:25:12,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:25:12,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:25:13,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:25:13,330 INFO L299 CfgBuilder]: Removed 75 assume(true) statements. [2021-11-03 05:25:13,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:25:13 BoogieIcfgContainer [2021-11-03 05:25:13,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:25:13,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:25:13,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:25:13,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:25:13,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:25:11" (1/3) ... [2021-11-03 05:25:13,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa8bbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:25:13, skipping insertion in model container [2021-11-03 05:25:13,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:25:12" (2/3) ... [2021-11-03 05:25:13,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa8bbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:25:13, skipping insertion in model container [2021-11-03 05:25:13,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:25:13" (3/3) ... [2021-11-03 05:25:13,344 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2021-11-03 05:25:13,354 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:25:13,354 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-03 05:25:13,406 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:25:13,413 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 [2021-11-03 05:25:13,413 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-03 05:25:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 83 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:25:13,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:13,448 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:25:13,450 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-03 05:25:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:13,455 INFO L85 PathProgramCache]: Analyzing trace with hash 415529033, now seen corresponding path program 1 times [2021-11-03 05:25:13,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:25:13,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416246965] [2021-11-03 05:25:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:13,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:25:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:25:13,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:25:13,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416246965] [2021-11-03 05:25:13,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416246965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:13,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:13,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:25:13,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724909451] [2021-11-03 05:25:13,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:25:13,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:25:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:25:13,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:25:13,622 INFO L87 Difference]: Start difference. First operand has 84 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 83 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:13,646 INFO L93 Difference]: Finished difference Result 165 states and 267 transitions. [2021-11-03 05:25:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:25:13,647 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 05:25:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:13,656 INFO L225 Difference]: With dead ends: 165 [2021-11-03 05:25:13,656 INFO L226 Difference]: Without dead ends: 79 [2021-11-03 05:25:13,659 INFO L786 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 [2021-11-03 05:25:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-03 05:25:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-03 05:25:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-11-03 05:25:13,694 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 5 [2021-11-03 05:25:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:13,695 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-11-03 05:25:13,695 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-11-03 05:25:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:25:13,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:13,696 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:25:13,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:25:13,697 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-03 05:25:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:13,698 INFO L85 PathProgramCache]: Analyzing trace with hash -23616576, now seen corresponding path program 1 times [2021-11-03 05:25:13,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:25:13,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495086948] [2021-11-03 05:25:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:13,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:25:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:25:13,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:25:13,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495086948] [2021-11-03 05:25:13,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495086948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:13,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:13,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:25:13,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693481016] [2021-11-03 05:25:13,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:25:13,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:25:13,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:25:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:25:13,751 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:13,778 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2021-11-03 05:25:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:25:13,779 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 05:25:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:13,780 INFO L225 Difference]: With dead ends: 157 [2021-11-03 05:25:13,781 INFO L226 Difference]: Without dead ends: 81 [2021-11-03 05:25:13,782 INFO L786 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 [2021-11-03 05:25:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-03 05:25:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-03 05:25:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2021-11-03 05:25:13,791 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 6 [2021-11-03 05:25:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:13,792 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2021-11-03 05:25:13,792 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2021-11-03 05:25:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:25:13,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:13,793 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:13,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:25:13,794 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-03 05:25:13,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2044634814, now seen corresponding path program 1 times [2021-11-03 05:25:13,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:25:13,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302973048] [2021-11-03 05:25:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:13,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:25:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:25:13,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:25:13,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302973048] [2021-11-03 05:25:13,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302973048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:13,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:13,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:25:13,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397951243] [2021-11-03 05:25:13,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:25:13,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:25:13,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:25:13,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:25:13,876 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:13,953 INFO L93 Difference]: Finished difference Result 212 states and 231 transitions. [2021-11-03 05:25:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:25:13,954 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 05:25:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:13,956 INFO L225 Difference]: With dead ends: 212 [2021-11-03 05:25:13,956 INFO L226 Difference]: Without dead ends: 206 [2021-11-03 05:25:13,957 INFO L786 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 [2021-11-03 05:25:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-03 05:25:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 83. [2021-11-03 05:25:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.267605633802817) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-11-03 05:25:13,967 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 8 [2021-11-03 05:25:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:13,967 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-11-03 05:25:13,968 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-11-03 05:25:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:25:13,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:13,969 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:13,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:25:13,969 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-03 05:25:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1540621603, now seen corresponding path program 1 times [2021-11-03 05:25:13,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:25:13,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472515277] [2021-11-03 05:25:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:13,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:25:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:25:14,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:25:14,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472515277] [2021-11-03 05:25:14,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472515277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:14,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:14,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:25:14,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789891232] [2021-11-03 05:25:14,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:25:14,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:25:14,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:25:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:25:14,105 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:14,410 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-11-03 05:25:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:25:14,410 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:25:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:14,412 INFO L225 Difference]: With dead ends: 110 [2021-11-03 05:25:14,412 INFO L226 Difference]: Without dead ends: 108 [2021-11-03 05:25:14,412 INFO L786 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 [2021-11-03 05:25:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-03 05:25:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2021-11-03 05:25:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-11-03 05:25:14,427 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 15 [2021-11-03 05:25:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:14,427 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-11-03 05:25:14,428 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-11-03 05:25:14,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 05:25:14,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:14,429 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:14,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:25:14,429 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-03 05:25:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1518672590, now seen corresponding path program 1 times [2021-11-03 05:25:14,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:25:14,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747355655] [2021-11-03 05:25:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:14,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:25:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:25:14,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:25:14,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747355655] [2021-11-03 05:25:14,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747355655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:14,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:14,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:25:14,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618239734] [2021-11-03 05:25:14,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:25:14,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:25:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:25:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:25:14,580 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:14,779 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-03 05:25:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:25:14,780 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 05:25:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:14,781 INFO L225 Difference]: With dead ends: 81 [2021-11-03 05:25:14,781 INFO L226 Difference]: Without dead ends: 79 [2021-11-03 05:25:14,782 INFO L786 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 [2021-11-03 05:25:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-03 05:25:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-03 05:25:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-11-03 05:25:14,788 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 15 [2021-11-03 05:25:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:14,788 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-11-03 05:25:14,788 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-11-03 05:25:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:25:14,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:14,789 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:14,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:25:14,790 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-03 05:25:14,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash 643616153, now seen corresponding path program 1 times [2021-11-03 05:25:14,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:25:14,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180370371] [2021-11-03 05:25:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:14,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:25:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:25:14,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:25:14,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180370371] [2021-11-03 05:25:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180370371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:14,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:14,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:25:14,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53126757] [2021-11-03 05:25:14,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:25:14,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:25:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:25:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:25:14,858 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:15,058 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2021-11-03 05:25:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:25:15,059 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 05:25:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:15,062 INFO L225 Difference]: With dead ends: 189 [2021-11-03 05:25:15,062 INFO L226 Difference]: Without dead ends: 187 [2021-11-03 05:25:15,063 INFO L786 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 [2021-11-03 05:25:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-03 05:25:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 85. [2021-11-03 05:25:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-11-03 05:25:15,071 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 18 [2021-11-03 05:25:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:15,071 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-11-03 05:25:15,072 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-11-03 05:25:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:25:15,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:15,073 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:15,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:25:15,073 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-03 05:25:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash -404483557, now seen corresponding path program 1 times [2021-11-03 05:25:15,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:25:15,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277184614] [2021-11-03 05:25:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:15,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:25:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:25:15,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:25:15,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277184614] [2021-11-03 05:25:15,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277184614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:15,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:15,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:25:15,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120063907] [2021-11-03 05:25:15,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:25:15,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:25:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:25:15,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:25:15,129 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:15,346 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2021-11-03 05:25:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:25:15,347 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 05:25:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:15,348 INFO L225 Difference]: With dead ends: 187 [2021-11-03 05:25:15,348 INFO L226 Difference]: Without dead ends: 185 [2021-11-03 05:25:15,349 INFO L786 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 [2021-11-03 05:25:15,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-03 05:25:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 91. [2021-11-03 05:25:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 90 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-11-03 05:25:15,356 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 18 [2021-11-03 05:25:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:15,356 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-11-03 05:25:15,356 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-11-03 05:25:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 05:25:15,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:15,358 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:15,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:25:15,358 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-11-03 05:25:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1240790775, now seen corresponding path program 1 times [2021-11-03 05:25:15,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:25:15,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45166392] [2021-11-03 05:25:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:15,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:25:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:25:15,381 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 05:25:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:25:15,428 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 05:25:15,429 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 05:25:15,430 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:25:15,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:25:15,438 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:15,441 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:25:15,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:25:15 BoogieIcfgContainer [2021-11-03 05:25:15,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:25:15,480 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:25:15,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:25:15,480 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:25:15,481 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:25:13" (3/4) ... [2021-11-03 05:25:15,482 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-03 05:25:15,522 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 05:25:15,523 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:25:15,524 INFO L168 Benchmark]: Toolchain (without parser) took 3872.95 ms. Allocated memory is still 148.9 MB. Free memory was 114.6 MB in the beginning and 65.6 MB in the end (delta: 49.1 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:25:15,525 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:25:15,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 532.20 ms. Allocated memory is still 148.9 MB. Free memory was 114.3 MB in the beginning and 115.9 MB in the end (delta: -1.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 05:25:15,526 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.66 ms. Allocated memory is still 148.9 MB. Free memory was 115.9 MB in the beginning and 112.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:25:15,526 INFO L168 Benchmark]: Boogie Preprocessor took 76.50 ms. Allocated memory is still 148.9 MB. Free memory was 112.9 MB in the beginning and 110.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:25:15,527 INFO L168 Benchmark]: RCFGBuilder took 1011.61 ms. Allocated memory is still 148.9 MB. Free memory was 110.5 MB in the beginning and 118.0 MB in the end (delta: -7.5 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:25:15,528 INFO L168 Benchmark]: TraceAbstraction took 2142.23 ms. Allocated memory is still 148.9 MB. Free memory was 117.2 MB in the beginning and 67.7 MB in the end (delta: 49.5 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:25:15,528 INFO L168 Benchmark]: Witness Printer took 43.15 ms. Allocated memory is still 148.9 MB. Free memory was 67.7 MB in the beginning and 65.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:25:15,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 532.20 ms. Allocated memory is still 148.9 MB. Free memory was 114.3 MB in the beginning and 115.9 MB in the end (delta: -1.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.66 ms. Allocated memory is still 148.9 MB. Free memory was 115.9 MB in the beginning and 112.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.50 ms. Allocated memory is still 148.9 MB. Free memory was 112.9 MB in the beginning and 110.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1011.61 ms. Allocated memory is still 148.9 MB. Free memory was 110.5 MB in the beginning and 118.0 MB in the end (delta: -7.5 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2142.23 ms. Allocated memory is still 148.9 MB. Free memory was 117.2 MB in the beginning and 67.7 MB in the end (delta: 49.5 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. * Witness Printer took 43.15 ms. Allocated memory is still 148.9 MB. Free memory was 67.7 MB in the beginning and 65.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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); [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 [L639] COND FALSE !(__VERIFIER_nondet_int()) [L652] COND FALSE !(!data) [L615] COND FALSE !(!(shape)) [L616] shape->next [L616] COND FALSE !(shape->next) [L622] COND FALSE !(!(shape)) [L623] EXPR shape->next [L623] COND FALSE !(!(shape->next == ((void *)0))) [L624] EXPR shape->slist [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [L625] EXPR shape->slist->next [L625] COND TRUE !(shape->slist->next == ((void *)0)) [L565] reach_error() - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 2.0s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 488 SDtfs, 715 SDslu, 764 SDs, 0 SdLazy, 420 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 346 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 460 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 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! [2021-11-03 05:25:15,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_009f408a-d196-4e11-a167-37219aa0ac92/bin/utaipan-aC7eJsxGYH/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